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Aluminum Intake Plenum. Porsche 996 With Factory X51 Upgrade IPD ❭ 96174-X
- Porsche 996 C2 3.6L 09/01-2005
- Porsche 996 C4 3.6L 09/01-2005
- Porsche 996 C4S 3.6L 09/01-2005

The total and complete redesign of the 911 engine was fitted with the vintage plastic "T" style air distributor that Porsche has used since the early 911 days. This intake system was found on virtually all 911 Carrera's until the arrival of the DFI cars in 2009.
The unique, innovative and patented design of the IPD Plenum employs a "Y" design that improves performance by channeling air left and right to the cylinder banks more efficiently. This design reduces air flow turbulence and increases air flow velocity resulting in substantial power gains throughout the entire rpm band.
The IPD plenum not only delivers impressive power and torque increases but also creates a more linear power and torque band. Tiptronic customers even claim considerable improvements with more positive shifting after installing the IPD Plenums.
The 996 3.6L X51 package was typically found on the "40th Anniversary" limited edition cars (MY 2004) but could also be special ordered by performance minded customers. The X51 engine package increased horsepower from the standard 316 up to 345.
The X51 Carrera's came equipped with a variety performance upgrades, both internally and externally, that made the cars very desirable for Porsche drivers looking for something closer to the GT3 experience.
The X51 engine package was blessed with many wonderful internal performance upgrades but Porsche still utilized the factory air distributor opening the door for the IPD Plenum to provide even more additional power.
The 996 X51 IPD Plenum is designed to use all the pre-existing factory hardware and OE 74mm throttle body. The revolutionary design of the IPD "Y" style Intake Plenum increase horsepower by 24 and torque by 22 (at the wheels).
The X51 Plenum is a direct bolt on replacement and installation is relatively straight forward for mechanically inclined DIY customers although IPD strongly recommends all Plenum installations be performed by a trained and qualified Porsche technician.
Fits:
Porsche 996 X51 Upgrade cars 3.6L
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
96174-X
The product you are viewing cross references to these numbers
- Porsche 911 1974-1977 2.7L / 1976-77 3.0 Carrera
- Porsche 911 1978-1983 3.0L / SC
- Porsche 911 1984-1986 3.2L
- Porsche 911 1987-1989 3.2L G50

Fits:
Porsche 911 / 911S 2.7ltr - 1974 to 1977
Porsche 911 SC - 1978 to 1983
Porsche 911 3.2 Carrera - 1984 to 1989
These adapters are used to modify the 2.7ltr / 3.0ltr / 3.2ltr Porsche 911 2 bolt cylinder head engines to the later 964 / 993 3.6ltr intake manifolds when converting to EFI.
CNC machined on a 5 axis machine to our exacting tolerances and finish and anodised dark grey these are custom machined to match your port diameter and tapered to fit up to the 42mm inlet manifold port size.
The short adapor height maintains the overall height of the intake set, reducing the interference between the idle air control, the intake boot and the top of the engine bay insulation. The factory plastic 3 bolt 964 stacks are too tall, and adding an adapter spacer would make the manifolds not fit at all.
This design permits the use of the standard 964 fuel injectors and fuel rails so positions the injector over the same relief in the intake port for the original CIS injector, ensuring proper atomisation of the injector spray into the intake port.
Key Features:
Precision machined from high grade aluminium
Anodized finish
Fits all Bosch 14mm O-ring fuel injectors
Fuel rail spacers are marked for easy cutting to suit long, medium or short injector types.
Kit Includes:
6 x CNC aluminium adapters
4 x Spacer/Posts for fuel rail
4 x Bolts to suit standard full length Bosch injectors
12 x Nuts and washers
Fuel rails not included in kit
34mm / 40mm / 41mm / 42mm adaptors are made to order. Please allow 4-5 weeks for delivery
Check out our fuel rail and fuel pressure regulator kits to make the perfect conversion set
- Porsche 911 1974-1977 2.7L / 1976-77 3.0 Carrera
- Porsche 911 1978-1983 3.0L / SC
- Porsche 911 1984-1986 3.2L
- Porsche 911 1987-1989 3.2L G50
6 x manifold adaptors (no fuel rail)
Fits:
Porsche 911 / 911S 2.7ltr - 1974 to 1977
Porsche 911 SC - 1978 to 1983
Porsche 911 3.2 Carrera - 1984 to 1989
These adapters are used to adapt the 2.7ltr / 3.0ltr and 3.2ltr Porsche 911 2-bolt cylinder head engines to take the 996 GT3 intake manifolds when converting to EFI.
CNC machined our exacting tolerances and finish and anodised dark grey these are custom machined to match your port diameter and tapered to fit the 49mm bore of the GT3 inlet manifold.
The short height maintains the overall height of the intake set, reducing the interference between the idle air control valve, the intake boot and the top of the engine bay insulation.
This design permits the use of the AMS fuel rails, and positions the injector over the same relief in the intake port for the original CIS injector, ensuring proper atomisation of the injector spray into the intake port.
Key Features:
Precision machined from high grade aluminium
Anodized finish
Fits all Bosch 14mm O-ring fuel injectors
Fuel rail spacers are marked for easy cutting to suit long, medium or short injector types.
Kit includes:
- CNC aluminium adapters x 6
- Spacer/Posts for fuel rail x 4
- Bolts to suit standard full length Bosch injectors x 4
- Nuts and washers for cylinder head studs x 12
What's Not Included:
Fuel rails, manifolds, rubber joiners, injectors, hose clamps pictured are not included in the sale.
44mm adaptors are made to order. Please allow 4-5 weeks for delivery
Check out our fuel rail and fuel pressure regulator kits to make the perfect conversion set.
- Porsche 911 1974-1977 2.7L / 1976-77 3.0 Carrera
- Porsche 911 1978-1983 3.0L / SC
- Porsche 911 1984-1986 3.2L
- Porsche 911 1987-1989 3.2L G50
Convert the G-Model engine to 964/993 induction with Drive by Wire set-up

Fits:
Porsche 911 - 1974 - 1989
Please Note:
The aluminium or plastic intake plenum(inlet manifold) is not included in the kit
Product Overview:
Inject power and precision into your vintage aircooled engine
Conversion kit for the 911 G-model to become a DBW (Drive by wire) intake based on the 964 induction and using the 74mm original Bosch throttle body (Sometimes referred to as 76mm). This is intended to breathe a bit more life into a classic G-model.
The kit includes
Intake runners are made out of billet aluminium, 3D milled in a 5-axis machine. The port diameter indicated in the options is the diameter of the port in the cylinder head. Please note that these are the 2-bolt designs.
To create a bit of intimacy between you and your engine we have included a bit of DIY work for you to convert your existing Porsche 964 intake into this version.
The intake also exists in two versions - this version is what we at Islandworks use with all other intakes, being a modified PA12 material from an industrial manufacturing process. Both options have the same performance and the same durability with the difference being the look and feel of a 5-axis machined piece as the very first thing you lay your eyes on when you open the engine decklid!
For both options the lower resonance tube is made from our usual modified PA12 in black.
The following parts will be reused from the 964 intake:
Please Note:
The aluminium or plastic intake plenum is not included in the kit and neither are any of the items specifically listed as excluded above.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
96411090130
The product you are viewing cross references to these numbers
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