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Solid Rear Torsion Bars. Porsche 911/912 1965-86 - RS11
RS11
Vehicle Group
- Porsche 911 1965-1968 2.0L / 912 SWB (F)
- Porsche 911 1968-1973 2.2L / 2.4L / 2.7L RS LWB (F)
- Porsche 911 1974-1977 2.7L / 1976-77 3.0 Carrera
- Porsche 911 1978-1983 3.0L / SC
- Porsche 911 1984-1986 3.2L
Information
High-performance Sway-A-Way solid rear torsion bars for the Porsche 911 1965-86, designed as a direct replacement and performance upgrade for the original rear torsion bars. The Sway-A-Way solid range is available from a relatively road-friendly 22 mm through to the much firmer 30 mm competition specification, making it possible to tailor the suspension to the vehicle's weight, tyres, dampers and intended use.
SET OF 2, One pair is required per vehicle.
Fits:
Porsche 911 / 912: 1965 through 1986
* Rear axle application using the 24 11/16-inch short torsion-bar configuration
* These bars Does not fit 1987–1989 Porsche 911 models. The G50-equipped cars require longer torsion bars and have a different spline configuration.
Designed as direct replacements for the original rear torsion bars, these performance bars provide a straightforward way to restore or increase the rear suspension spring rate while retaining the classic Porsche torsion-bar suspension layout.
Available Torsion Bar Sizes
22 mm (Stock / Mild Upgrade)
The 22 mm solid torsion bar is the mildest option in the range and is particularly suitable for standard or lightly modified road cars. It provides a factory-style or mild performance spring rate while offering the benefits of a new, high-quality replacement torsion bar.
Recommended for:
• Standard road cars
• Restoration projects
• Touring use
• Mild suspension upgrades
• Cars where ride comfort remains important
A strong choice when replacing tired original torsion bars without moving to a substantially firmer suspension setup.
Critical Fitment Exceptions:
Even if your car falls into the year ranges above, you must ensure it does not fall under these exceptions:
• 1987–1989 Porsche 911 (G50): This SKU will not fit the later G50-equipped 911s. Those models utilize a significantly longer torsion bar (approx. 26") and different spline configurations.
• Performance Note: A 22mm bar is a standard replacement for many early Porsche models. If you are building a track-oriented 911 or a high-horsepower VW, you may require a larger diameter (24mm–26mm) to handle the increased cornering loads.
23 mm Solid (Performance Upgrade)
The 23 mm solid torsion bar provides a noticeable increase in rear spring rate compared with a typical 22 mm setup. It offers improved rear suspension support while remaining suitable for performance-oriented road use.
Recommended for:
• Fast-road Porsche 911s
• Weekend sports cars
• Mild performance builds
• Uprated dampers
• Occasional autocross or track use
Critical Fitment Exceptions:
Even if your car falls into the year ranges above, you must ensure it does not fall under these exceptions:
• G50 Transmission Porsche 911: This part will not fit 1987–1989 Porsche 911 models equipped with the G50 transaxle, which require longer bars and have different spline counts.
• Stiffening Note: Moving to 23mm from a stock 22mm bar provides a noticeable increase in spring rate. While excellent for spirited driving, ensure your shock absorbers are valved to handle the increased rebound speed.
24 mm Solid (Sport / Street Upgrade)
The 24 mm solid torsion bar moves further into performance territory, providing increased resistance to rear suspension compression and acceleration squat.
Recommended for:
• Fast-road cars
• Autocross
• Occasional track use
• Cars with uprated dampers
• Performance suspension builds
• Modern high-grip tyres
This is a versatile choice for owners looking for a meaningful handling upgrade while retaining road usability.
Critical Fitment Exceptions:
Even if your car falls into the year ranges above, you must ensure it does not fall under these exceptions:
• G50 Transmission Porsche 911: This SKU is incompatible with 1987–1989 Porsche 911 models. Those vehicles utilize a longer torsion bar and different spline counts specific to the G50 transaxle.
• Significant Stiffness Increase: A 24mm bar is roughly 40% stiffer than a stock 22mm bar. This upgrade is highly recommended for autocross or spirited street driving but may require upgraded shock valving to control the increased spring frequency.
25 mm Solid (Performance / Race Upgrade)
The 25 mm solid rear torsion bar provides a stronger increase in spring rate and is well suited to more serious performance road and track-day applications.
Recommended for:
• Aggressive fast-road use
• Track-day cars
• Autocross
• Higher-powered engines
• Uprated front torsion bars
• Performance-valved dampers
Critical Fitment Exceptions:
Even if your car falls into the year ranges above, you must ensure it does not fall under these exceptions:
• 1987–1989 Porsche 911 (G50): These bars will not fit 911 models equipped with the G50 transaxle. The G50 cars utilize longer torsion bars (~26") and a different spline count.
• Aggressive Stiffness: A 25mm bar is significantly stiffer than the factory 22mm or 23mm bars. This upgrade will noticeably firm up the ride quality and typically requires performance-valved shock absorbers to properly manage the increased spring frequency.
26 mm Solid (Competition / Heavy-Duty Upgrade)
The 26 mm solid torsion bar provides substantial rear suspension support and moves the chassis setup further toward track use.
Recommended for:
• Fast-road / track builds
• Regular track days
• Lightweight Porsche 911s
• High-grip tyres
• Cars using matched performance dampers
At this level, front and rear suspension balance becomes increasingly important.
Critical Fitment Exceptions:
Even if your car falls into the year ranges above, you must ensure it does not fall under these exceptions:
• G50 Transmission Porsche 911: This SKU will not fit 1987–1989 Porsche 911 models. The G50-equipped cars require longer torsion bars (~26") and use a different spline configuration.
• Extreme Stiffness Warning: A 26mm bar is roughly 95% stiffer than a factory 22mm bar. This will result in a very rigid ride quality. It is highly recommended to pair these with race-valved shock absorbers and reinforced mounting points to prevent chassis fatigue.
27 mm Solid (Extreme Performance Upgrade)
The 27 mm solid rear torsion bar is a performance-focused option offering strong resistance to body roll and rear-end squat.
Recommended for:
• Track-focused cars
• Autocross
• Competition-inspired builds
• Lightweight performance cars
• High-power applications
• Appropriately matched front torsion bars
Critical Fitment Exceptions:
Even if your car falls into the year ranges above, you must ensure it does not fall under these exceptions:
• G50 Transmission Porsche 911: This SKU is incompatible with 1987–1989 Porsche 911 models. The G50-equipped cars utilize significantly longer torsion bars and have a different spline configuration.
• Track-Only Stiffness Warning: A 27mm bar is over 125% stiffer than a factory 22mm bar. This results in an incredibly rigid ride. It is highly recommended for dedicated track or competition use only, as the stiffness can cause significant chassis stress and "skipping" on uneven street surfaces without professional-grade dampers.
28 mm Solid (Extreme Competition Upgrade)
The 28 mm solid torsion bar is a high-rate competition-oriented option. It provides significantly increased rear spring stiffness and is designed for vehicles where maximum suspension control is more important than standard road comfort.
Recommended for:
• Dedicated track cars
• Motorsport applications
• Race-prepared Porsche 911s
• High-grip tyre packages
• Competition dampers
• Lightweight builds
Critical Fitment Exceptions:
Even if your car falls into the year ranges above, you must ensure it does not fall under these exceptions:
• G50 Transmission Porsche 911: This SKU is incompatible with 1987–1989 Porsche 911 models. Those vehicles utilize significantly longer torsion bars (~26") and different spline counts specific to the G50 transaxle.
• Race-Only Stiffness: A 28mm bar is over 160% stiffer than a factory 22mm bar. This results in an incredibly rigid ride. It is recommended for dedicated track, autocross, or drag racing use only; use on street surfaces may cause excessive chassis stress without reinforced mounting points.
29 mm Solid (Extreme Competition Upgrade)
The 29 mm solid rear torsion bar provides a very high spring rate for serious competition-oriented suspension setups.
Recommended for:
• Race cars
• Motorsport
• High-horsepower track builds
• High-grip competition tyres
• Cars with fully developed suspension packages
Professional chassis setup is strongly recommended with this spring rate.
Critical Fitment Exceptions:
Even if your car falls into the year ranges above, you must ensure it does not fall under these exceptions:
• G50 Transmission Porsche 911: This SKU is incompatible with 1987–1989 Porsche 911 models. Those vehicles utilize significantly longer torsion bars (~26") and different spline counts specific to the G50 transaxle.
• Race-Only Stiffness Warning: A 29mm bar is over 200% stiffer than a factory 22mm bar. This results in an incredibly rigid ride quality. It is strictly recommended for dedicated track, drag racing, or heavy-duty competition use; street use may cause excessive chassis stress without reinforced mounting points and specialized damping.
30 mm Solid (Ultimate Competition / Weight Reduction)
The 30 mm solid torsion bar is the stiffest option in this range and is intended primarily for dedicated competition applications. It provides very high resistance to suspension compression, roll and acceleration squat.
Recommended for:
• Dedicated race cars
• Motorsport builds
• High-power competition Porsche 911s
• Cars using competition dampers
• Highly developed chassis setups
• Applications where road comfort is not a priority
Critical Fitment Exceptions:
Even if your car falls into the year ranges above, you must ensure it does not fall under these exceptions:
• G50 Transmission Porsche 911: This SKU is incompatible with 1987–1989 Porsche 911 models. The G50-equipped cars require longer torsion bars and have a different spline configuration.
• Maximum Stiffness Warning: A 30mm spring rate is roughly 250% stiffer than a factory 22mm bar. Even with the weight savings of a tubular design, the ride will be extremely rigid. This setup is strictly recommended for dedicated track vehicles, heavy V8-conversion sand rails, or professional-grade drag racing only.
Why Upgrade Rear Torsion Bars?
The torsion bars are the primary springs in the classic Porsche 911 rear suspension.
Increasing their diameter raises the spring rate, which can provide:
• Reduced body roll
• Reduced rear-end squat under acceleration
• Improved rear suspension control
• More immediate chassis response
• Greater stability during fast cornering
• Better support for modern performance tyres
• Improved track performance
The correct size depends heavily on the complete vehicle specification.
Solid Construction
These Sway-A-Way torsion bars use a traditional solid steel construction.
Solid torsion bars offer:
• Proven design
• High torsional strength
• Excellent durability
• Predictable spring characteristics
• Wide range of available rates
• Excellent value compared with tubular alternatives
• Suitability for both road and competition applications
For customers who prioritise spring rate, durability and value rather than the weight saving of hollow bars, the solid range is an excellent choice.
Precision Manufacturing
Sway-A-Way torsion bars are manufactured to provide consistent spring performance under repeated suspension loading.
Construction features include:
• High-strength alloy steel
• Precision centreless grinding
• Controlled heat treatment
• Consistent outside diameter
• High fatigue resistance
• Protective powder-coated finish
These manufacturing processes help ensure predictable suspension behaviour and long service life.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
RS11
The product you are viewing cross references to these numbers
SET OF 2, One pair is required per vehicle.
Fits:
Porsche 911 / 912: 1965 through 1986
* Rear axle application using the 24 11/16-inch short torsion-bar configuration
* These bars Does not fit 1987–1989 Porsche 911 models. The G50-equipped cars require longer torsion bars and have a different spline configuration.
Designed as direct replacements for the original rear torsion bars, these performance bars provide a straightforward way to restore or increase the rear suspension spring rate while retaining the classic Porsche torsion-bar suspension layout.
Available Torsion Bar Sizes
22 mm (Stock / Mild Upgrade)
The 22 mm solid torsion bar is the mildest option in the range and is particularly suitable for standard or lightly modified road cars. It provides a factory-style or mild performance spring rate while offering the benefits of a new, high-quality replacement torsion bar.
Recommended for:
• Standard road cars
• Restoration projects
• Touring use
• Mild suspension upgrades
• Cars where ride comfort remains important
A strong choice when replacing tired original torsion bars without moving to a substantially firmer suspension setup.
Critical Fitment Exceptions:
Even if your car falls into the year ranges above, you must ensure it does not fall under these exceptions:
• 1987–1989 Porsche 911 (G50): This SKU will not fit the later G50-equipped 911s. Those models utilize a significantly longer torsion bar (approx. 26") and different spline configurations.
• Performance Note: A 22mm bar is a standard replacement for many early Porsche models. If you are building a track-oriented 911 or a high-horsepower VW, you may require a larger diameter (24mm–26mm) to handle the increased cornering loads.
23 mm Solid (Performance Upgrade)
The 23 mm solid torsion bar provides a noticeable increase in rear spring rate compared with a typical 22 mm setup. It offers improved rear suspension support while remaining suitable for performance-oriented road use.
Recommended for:
• Fast-road Porsche 911s
• Weekend sports cars
• Mild performance builds
• Uprated dampers
• Occasional autocross or track use
Critical Fitment Exceptions:
Even if your car falls into the year ranges above, you must ensure it does not fall under these exceptions:
• G50 Transmission Porsche 911: This part will not fit 1987–1989 Porsche 911 models equipped with the G50 transaxle, which require longer bars and have different spline counts.
• Stiffening Note: Moving to 23mm from a stock 22mm bar provides a noticeable increase in spring rate. While excellent for spirited driving, ensure your shock absorbers are valved to handle the increased rebound speed.
24 mm Solid (Sport / Street Upgrade)
The 24 mm solid torsion bar moves further into performance territory, providing increased resistance to rear suspension compression and acceleration squat.
Recommended for:
• Fast-road cars
• Autocross
• Occasional track use
• Cars with uprated dampers
• Performance suspension builds
• Modern high-grip tyres
This is a versatile choice for owners looking for a meaningful handling upgrade while retaining road usability.
Critical Fitment Exceptions:
Even if your car falls into the year ranges above, you must ensure it does not fall under these exceptions:
• G50 Transmission Porsche 911: This SKU is incompatible with 1987–1989 Porsche 911 models. Those vehicles utilize a longer torsion bar and different spline counts specific to the G50 transaxle.
• Significant Stiffness Increase: A 24mm bar is roughly 40% stiffer than a stock 22mm bar. This upgrade is highly recommended for autocross or spirited street driving but may require upgraded shock valving to control the increased spring frequency.
25 mm Solid (Performance / Race Upgrade)
The 25 mm solid rear torsion bar provides a stronger increase in spring rate and is well suited to more serious performance road and track-day applications.
Recommended for:
• Aggressive fast-road use
• Track-day cars
• Autocross
• Higher-powered engines
• Uprated front torsion bars
• Performance-valved dampers
Critical Fitment Exceptions:
Even if your car falls into the year ranges above, you must ensure it does not fall under these exceptions:
• 1987–1989 Porsche 911 (G50): These bars will not fit 911 models equipped with the G50 transaxle. The G50 cars utilize longer torsion bars (~26") and a different spline count.
• Aggressive Stiffness: A 25mm bar is significantly stiffer than the factory 22mm or 23mm bars. This upgrade will noticeably firm up the ride quality and typically requires performance-valved shock absorbers to properly manage the increased spring frequency.
26 mm Solid (Competition / Heavy-Duty Upgrade)
The 26 mm solid torsion bar provides substantial rear suspension support and moves the chassis setup further toward track use.
Recommended for:
• Fast-road / track builds
• Regular track days
• Lightweight Porsche 911s
• High-grip tyres
• Cars using matched performance dampers
At this level, front and rear suspension balance becomes increasingly important.
Critical Fitment Exceptions:
Even if your car falls into the year ranges above, you must ensure it does not fall under these exceptions:
• G50 Transmission Porsche 911: This SKU will not fit 1987–1989 Porsche 911 models. The G50-equipped cars require longer torsion bars (~26") and use a different spline configuration.
• Extreme Stiffness Warning: A 26mm bar is roughly 95% stiffer than a factory 22mm bar. This will result in a very rigid ride quality. It is highly recommended to pair these with race-valved shock absorbers and reinforced mounting points to prevent chassis fatigue.
27 mm Solid (Extreme Performance Upgrade)
The 27 mm solid rear torsion bar is a performance-focused option offering strong resistance to body roll and rear-end squat.
Recommended for:
• Track-focused cars
• Autocross
• Competition-inspired builds
• Lightweight performance cars
• High-power applications
• Appropriately matched front torsion bars
Critical Fitment Exceptions:
Even if your car falls into the year ranges above, you must ensure it does not fall under these exceptions:
• G50 Transmission Porsche 911: This SKU is incompatible with 1987–1989 Porsche 911 models. The G50-equipped cars utilize significantly longer torsion bars and have a different spline configuration.
• Track-Only Stiffness Warning: A 27mm bar is over 125% stiffer than a factory 22mm bar. This results in an incredibly rigid ride. It is highly recommended for dedicated track or competition use only, as the stiffness can cause significant chassis stress and "skipping" on uneven street surfaces without professional-grade dampers.
28 mm Solid (Extreme Competition Upgrade)
The 28 mm solid torsion bar is a high-rate competition-oriented option. It provides significantly increased rear spring stiffness and is designed for vehicles where maximum suspension control is more important than standard road comfort.
Recommended for:
• Dedicated track cars
• Motorsport applications
• Race-prepared Porsche 911s
• High-grip tyre packages
• Competition dampers
• Lightweight builds
Critical Fitment Exceptions:
Even if your car falls into the year ranges above, you must ensure it does not fall under these exceptions:
• G50 Transmission Porsche 911: This SKU is incompatible with 1987–1989 Porsche 911 models. Those vehicles utilize significantly longer torsion bars (~26") and different spline counts specific to the G50 transaxle.
• Race-Only Stiffness: A 28mm bar is over 160% stiffer than a factory 22mm bar. This results in an incredibly rigid ride. It is recommended for dedicated track, autocross, or drag racing use only; use on street surfaces may cause excessive chassis stress without reinforced mounting points.
29 mm Solid (Extreme Competition Upgrade)
The 29 mm solid rear torsion bar provides a very high spring rate for serious competition-oriented suspension setups.
Recommended for:
• Race cars
• Motorsport
• High-horsepower track builds
• High-grip competition tyres
• Cars with fully developed suspension packages
Professional chassis setup is strongly recommended with this spring rate.
Critical Fitment Exceptions:
Even if your car falls into the year ranges above, you must ensure it does not fall under these exceptions:
• G50 Transmission Porsche 911: This SKU is incompatible with 1987–1989 Porsche 911 models. Those vehicles utilize significantly longer torsion bars (~26") and different spline counts specific to the G50 transaxle.
• Race-Only Stiffness Warning: A 29mm bar is over 200% stiffer than a factory 22mm bar. This results in an incredibly rigid ride quality. It is strictly recommended for dedicated track, drag racing, or heavy-duty competition use; street use may cause excessive chassis stress without reinforced mounting points and specialized damping.
30 mm Solid (Ultimate Competition / Weight Reduction)
The 30 mm solid torsion bar is the stiffest option in this range and is intended primarily for dedicated competition applications. It provides very high resistance to suspension compression, roll and acceleration squat.
Recommended for:
• Dedicated race cars
• Motorsport builds
• High-power competition Porsche 911s
• Cars using competition dampers
• Highly developed chassis setups
• Applications where road comfort is not a priority
Critical Fitment Exceptions:
Even if your car falls into the year ranges above, you must ensure it does not fall under these exceptions:
• G50 Transmission Porsche 911: This SKU is incompatible with 1987–1989 Porsche 911 models. The G50-equipped cars require longer torsion bars and have a different spline configuration.
• Maximum Stiffness Warning: A 30mm spring rate is roughly 250% stiffer than a factory 22mm bar. Even with the weight savings of a tubular design, the ride will be extremely rigid. This setup is strictly recommended for dedicated track vehicles, heavy V8-conversion sand rails, or professional-grade drag racing only.
Why Upgrade Rear Torsion Bars?
The torsion bars are the primary springs in the classic Porsche 911 rear suspension.
Increasing their diameter raises the spring rate, which can provide:
• Reduced body roll
• Reduced rear-end squat under acceleration
• Improved rear suspension control
• More immediate chassis response
• Greater stability during fast cornering
• Better support for modern performance tyres
• Improved track performance
The correct size depends heavily on the complete vehicle specification.
Solid Construction
These Sway-A-Way torsion bars use a traditional solid steel construction.
Solid torsion bars offer:
• Proven design
• High torsional strength
• Excellent durability
• Predictable spring characteristics
• Wide range of available rates
• Excellent value compared with tubular alternatives
• Suitability for both road and competition applications
For customers who prioritise spring rate, durability and value rather than the weight saving of hollow bars, the solid range is an excellent choice.
Precision Manufacturing
Sway-A-Way torsion bars are manufactured to provide consistent spring performance under repeated suspension loading.
Construction features include:
• High-strength alloy steel
• Precision centreless grinding
• Controlled heat treatment
• Consistent outside diameter
• High fatigue resistance
• Protective powder-coated finish
These manufacturing processes help ensure predictable suspension behaviour and long service life.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
RS11
91133310103
91133310203
91133310109
91133310116
91133310209
91133310216
90133310105
90133310106
90133310115
90133310205
90133310210
90133310206
The product you are viewing cross references to these numbers
Prices from: €436.85