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- Porsche 964 (911) C2 1989-93
- Porsche 964 (911) C4 1989-93
Performance Upgrade Chip with Premuffler / Cat Bypass
Unlock the full performance of your 1989-1994 Porsche 964
Carrera 2 or Carrera 4 with the OE Match Performance Upgrade Chip. Designed
specifically for cars fitted with a premuffler, catalytic converter bypass
or sports catalytic converter, together with either the factory rear
silencers, a muffler bypass or a sports muffler.
Fits:
- Porsche 964 (911) C2 1989-93
- Porsche 964 (911) C4 1989-93
Suitable for manual and Tiptronic models, this calibration also supports vehicles fitted with an RS lightweight flywheel, with the latest LWF software fix included as standard.
Optimised for Modified Exhaust Systems
Removing the restrictive factory catalytic converter
improves exhaust flow, but the Bosch Motronic ECU requires recalibration to
fully exploit the increased airflow. OE Match software provides the additional
fuel and optimised ignition timing needed to maximise performance while
maintaining safe air-fuel ratios and preventing excessive knock sensor
intervention.
The result is:
- Stronger low and mid-range torque
- Sharper throttle response
- Elimination of the factory flat spot below 4,000 rpm
- Smoother idle
- Dyno-proven horsepower gains
- Improved everyday drivability
Your 964 feels lighter, more responsive and pulls hard from
low engine speeds, making both road driving and track use considerably more
rewarding.
Dyno Developed for Real-World Driving
Unlike generic replacement chips, OE Match calibrations are
written specifically for each engine and exhaust configuration.
Every program has been extensively developed through
hundreds of hours of dyno tuning, road evaluation and real-world testing using
everyday pump fuel. Ignition timing, fuel delivery and throttle mapping have
all been optimised to deliver:
- Smoother idle
- Increased low and mid-range torque
- Sharper throttle response
- Elimination of the factory sub-4,000 rpm flat spot
- Stronger acceleration throughout the rev range
- Dyno-proven horsepower gains
- Improved everyday drivability
Unlike inferior calibrations, OE Match software maintains safe air-fuel ratios, ensuring the engine continues to run efficiently while avoiding the lean conditions that can reduce performance and increase knock sensor activity.
Includes the Lightweight Flywheel (LWF) Fix
Every calibration includes the latest Lightweight Flywheel Fix, eliminating the stalling and RPM dip commonly experienced after fitting an RS lightweight flywheel and clutch. The software also improves clutch engagement and throttle response while remaining fully compatible with standard flywheel vehicles.
Developed Specifically for Your 964
Unlike generic performance chips, every OE Match calibration has been developed through extensive dyno testing and real-world road evaluation using premium pump fuel. Each program is written specifically for your engine and exhaust configuration, delivering maximum performance without triggering the Check Engine Light.
Suitable for:
- Porsche 964 Carrera 2 & Carrera 4 Manual or Tiptronic transmission
- Premuffler Cat bypass pipe
- Sports catalytic converter
- Factory, sports or bypass rear silencers
- Factory
or RS lightweight flywheel
Benefits
- Increased horsepower and torque
- Sharper throttle response
- Eliminates the factory sub-4,000 rpm hesitation
- Improved acceleration throughout the rev range
- Smoother idle
- Eliminates lightweight flywheel stalling
- Better everyday drivability
- Dyno-developed Bosch Motronic calibration
- Will not trigger the Check Engine Light
Porsche 964 Premuffler & Cat Bypass Performance Chips
OE Match Performance Chips are specifically developed for Porsche 964 models fitted with freer-flowing exhaust systems. By recalibrating the Bosch Motronic ECU to suit premufflers, cat bypass pipes or sports catalytic converters, the engine delivers stronger torque, improved throttle response and smoother power delivery while maintaining safe engine operation.
Whether your 964 is fitted with a standard or lightweight flywheel, manual or Tiptronic transmission, Design911 offers model-specific OE Match calibrations engineered to maximise performance and reliability.
- Porsche 993 (911) C2 1994-97
- Porsche 993 (911) C4 1994-97
Performance Upgrade Chip – Non-Varioram Cars
Unlock the true performance of your 1994-1995 Porsche 993
Non-Varioram with the OE Match Performance Upgrade Chip. Developed
specifically for manual and Tiptronic (non-Driveblock) models, this
precision calibration transforms the drivability of the legendary 3.6-litre
flat-six, delivering stronger low and mid-range torque, sharper throttle
response and improved acceleration throughout the rev range.
Fits:
- Porsche 993 (911) C2 1994-95
- Porsche 993 (911) C4 1994-95
Compatible with Bosch Motronic DME 0.261.203.674 and
the following Porsche DME part numbers:
- 99361812301
- 99361812302
- 99361812303
- 99361812304
- 99361812305
- 99361812306
Transform the Way Your 993 Drives
The factory Bosch Motronic calibration leaves noticeable performance untapped. OE Match software has been extensively developed to eliminate the familiar flat spot below 4,000 rpm, allowing the engine to pull harder from low RPM while significantly improving throttle response and everyday drivability.
Benefits include:
- Stronger low and mid-range torque
- Sharper throttle response
- Eliminates the factory sub-4,000 rpm hesitation
- Improved acceleration throughout the rev range
- Dyno-proven horsepower gains
- Smoother, more responsive driving experience
Every calibration is designed for 91 AKI (95 RON) premium fuel as standard. If you regularly use 93 AKI (98 RON) fuel, an optimised 98 RON calibration can be supplied—simply select your preferred fuel grade when ordering.
Includes the Latest Lightweight Flywheel (LWF) Fix
If your 993 has been fitted with an RS lightweight flywheel, this software includes the latest LWF Fix to eliminate the stalling and RPM dip often associated with lightweight flywheel conversions.
The updated programming:
Eliminates stalling during deceleration and gear changes Prevents RPM dropping below idle Improves clutch engagement Reduces unnecessary clutch slip Enhances throttle response
The software is equally suitable for vehicles retaining the factory flywheel, and existing customers can update older OE Match chips to the latest LWF coding.
Optional Immobiliser / Driveblock Delete
This chip can also be supplied with the Immobiliser / Driveblock function disabled for vehicles originally equipped with the Porsche Driveblock system.
Disabling the Driveblock removes the need to deactivate the immobiliser with the key fob every time the vehicle is started, returning the car to the operating style of factory non-Driveblock models.
To complete the conversion, jumper relay 964.610.184.00 must be installed in relay position R61, exactly as fitted by Porsche on non-Driveblock vehicles.
Ordering Information
Porsche fitted six different Bosch Motronic DMEs to 1994-1995 Non-Varioram 993 models.
Before ordering, remove the DME unit from beneath the left-hand front seat and confirm the Bosch or Porsche part number printed on the Motronic label to ensure the correct chip is supplied.
Why Choose OE Match?
Unlike generic replacement chips, every OE Match calibration has been extensively refined through dyno development and real-world testing to provide maximum performance while maintaining factory reliability.
The software is engineered not to trigger the Check Engine Light
Benefits
- Increased horsepower and torque
- Sharper throttle response
- Eliminates the factory sub-4,000 rpm lag
- Improved low and mid-range acceleration
- Eliminates lightweight flywheel stalling
- Optional Driveblock removal Improved everyday drivability
Porsche 993 Non-Varioram Performance Chips & Bosch Motronic ECU Upgrades
OE Match Performance Chips are specifically developed for 1994-1995 Porsche 993 Non-Varioram models, optimising the Bosch Motronic ECU to deliver stronger torque, improved throttle response and increased horsepower while maintaining factory reliability.
Design911 supplies model-specific calibrations for manual and Tiptronic cars, with support for lightweight flywheel conversions, premium fuel calibrations and optional Driveblock removal. Every chip is matched to the correct Bosch DME to ensure perfect compatibility and maximum performance.
- Porsche 993 (911) C2 1994-97
- Porsche 993 (911) C4 1994-97
Performance Upgrade Chip – Non-Varioram with Lightweight Flywheel & Clutch
Unlock the full potential of your 1994-1995 Porsche 993 Non-Varioram with the OE Match Performance Upgrade Chip, developed specifically for cars fitted with an RS lightweight flywheel and clutch. Designed for manual and Tiptronic (non-Driveblock) models, this advanced Bosch Motronic calibration delivers stronger low and mid-range torque, sharper throttle response and improved drivability while incorporating the latest Lightweight Flywheel (LWF) software solution.
Fits:
- Porsche 993 (911) C2 1994-95
- Porsche 993 (911) C4 1994-95
Compatible with Bosch Motronic DME 0.261.203.674 and
the following Porsche DME part numbers:
- 99361812301
- 99361812302
- 99361812303
- 99361812304
- 99361812305
- 99361812306
Designed for Lightweight Flywheel Conversions
Fitting an RS lightweight flywheel allows the engine to rev more freely and respond faster, but many conversions suffer from unstable idle, RPM dip and stalling during deceleration or when pulling away.
OE Match has developed one of the most advanced software solutions available to eliminate these issues while enhancing the performance benefits of the lightweight flywheel.
The latest calibration:
- Eliminates lightweight flywheel stalling
- Prevents RPM dropping below idle during deceleration and gear changes
- Improves clutch engagement from standstill
- Reduces unnecessary clutch slip and wear
- Maximises the faster throttle response of the lightweight flywheel
Former OE Match customers can also have earlier chips updated to the latest LWF coding.
Unlock the Hidden Performance of the 3.6-Litre Flat-Six
The factory Bosch Motronic calibration leaves considerable performance untapped. OE Match software has been extensively developed to remove the familiar flat spot below 4,000 rpm, giving the engine stronger pulling power from low RPM and significantly improving throttle response.
Benefits include:
- Increased low and mid-range torque
- Sharper throttle response
- Eliminates the factory sub-4,000 rpm hesitation
- Improved acceleration throughout the rev range
- Dyno-proven horsepower gains
- Smoother, more responsive power delivery
The result is a 993 that feels noticeably more eager, making full use of the lightweight flywheel's quicker engine response.
Premium Fuel Calibration
Every OE Match chip is calibrated for 91 AKI (95 RON) premium unleaded fuel as standard. If you regularly use 93 AKI (98 RON) fuel, a dedicated 98 RON calibration can be supplied. Simply select your preferred fuel grade when ordering.
Optional Immobiliser / Driveblock Delete
For vehicles originally equipped with Porsche's Driveblock immobiliser, this chip can also be supplied with the immobiliser function disabled.
This removes the need to deactivate the immobiliser with the key fob before every journey, returning the vehicle to the operation of a factory non-Driveblock model.
To complete the conversion, install jumper relay 96461018400 into relay position R61, exactly as Porsche specified on non-Driveblock vehicles.
Ordering Information
Porsche fitted six different Bosch Motronic DMEs to 1994-1995 Non-Varioram models.
Before ordering, remove the DME unit from beneath the left-hand front seat and verify the Bosch or Porsche part number shown on the Motronic label to ensure the correct chip is supplied.
Why Choose OE Match?
Unlike generic replacement chips, every OE Match calibration is developed through extensive dyno testing and real-world road evaluation to suit the exact vehicle specification.
The software is engineered specifically for lightweight flywheel conversions, will not trigger the Check Engine Light
Benefits
- Increased horsepower and torque
- Sharper throttle response
- Eliminates the factory sub-4,000 rpm lag
- Eliminates lightweight flywheel stalling
- Improved clutch engagement
- Faster engine response Optional
- Driveblock removal
- Improved everyday drivability
- Premium fuel calibration (95 RON standard / 98 RON optional)
- Will not trigger the Check Engine Light
- Porsche 993 (911) C2 1994-97
- Porsche 993 (911) C4 1994-97
Performance Upgrade Chip – Non-Varioram Cars
Unlock the true performance of your 1994-1995 Porsche 993
Non-Varioram with the OE Match Performance Upgrade Chip. Developed
specifically for manual and Tiptronic (non-Driveblock) models, this
precision calibration transforms the drivability of the legendary 3.6-litre
flat-six, delivering stronger low and mid-range torque, sharper throttle
response and improved acceleration throughout the rev range.
Fits:
- Porsche 993 (911) C2 1994-95
- Porsche 993 (911) C4 1994-95
Compatible with Bosch Motronic DME 0.261.203.675 and
the following Porsche DME part numbers:
- 99361812403
- 99361812404
- 99361812405
- 99361812406
Transform the Way Your 993 Drives
The factory Bosch Motronic calibration leaves noticeable performance untapped. OE Match software has been extensively developed to eliminate the familiar flat spot below 4,000 rpm, allowing the engine to pull harder from low RPM while significantly improving throttle response and everyday drivability.
Benefits include:
- Stronger low and mid-range torque
- Sharper throttle response
- Eliminates the factory sub-4,000 rpm hesitation
- Improved acceleration throughout the rev range
- Dyno-proven horsepower gains
- Smoother, more responsive driving experience
Every calibration is designed for 91 AKI (95 RON) premium fuel as standard. If you regularly use 93 AKI (98 RON) fuel, an optimised 98 RON calibration can be supplied—simply select your preferred fuel grade when ordering.
Includes the Latest Lightweight Flywheel (LWF) Fix
If your 993 has been fitted with an RS lightweight flywheel, this software includes the latest LWF Fix to eliminate the stalling and RPM dip often associated with lightweight flywheel conversions.
The updated programming:
Eliminates stalling during deceleration and gear changes Prevents RPM dropping below idle Improves clutch engagement Reduces unnecessary clutch slip Enhances throttle response
The software is equally suitable for vehicles retaining the factory flywheel, and existing customers can update older OE Match chips to the latest LWF coding.
Optional Immobiliser / Driveblock Delete
This chip can also be supplied with the Immobiliser / Driveblock function disabled for vehicles originally equipped with the Porsche Driveblock system.
Disabling the Driveblock removes the need to deactivate the immobiliser with the key fob every time the vehicle is started, returning the car to the operating style of factory non-Driveblock models.
To complete the conversion, jumper relay 964.610.184.00 must be installed in relay position R61, exactly as fitted by Porsche on non-Driveblock vehicles.
Ordering Information
Porsche fitted six different Bosch Motronic DMEs to 1994-1995 Non-Varioram 993 models.
Before ordering, remove the DME unit from beneath the left-hand front seat and confirm the Bosch or Porsche part number printed on the Motronic label to ensure the correct chip is supplied.
Why Choose OE Match?
Unlike generic replacement chips, every OE Match calibration has been extensively refined through dyno development and real-world testing to provide maximum performance while maintaining factory reliability.
The software is engineered not to trigger the Check Engine Light
Benefits
- Increased horsepower and torque
- Sharper throttle response
- Eliminates the factory sub-4,000 rpm lag
- Improved low and mid-range acceleration
- Eliminates lightweight flywheel stalling
- Optional Driveblock removal Improved everyday drivability
Porsche 993 Non-Varioram Performance Chips & Bosch Motronic ECU Upgrades
OE Match Performance Chips are specifically developed for 1994-1995 Porsche 993 Non-Varioram models, optimising the Bosch Motronic ECU to deliver stronger torque, improved throttle response and increased horsepower while maintaining factory reliability.
Design911 supplies model-specific calibrations for manual and Tiptronic cars, with support for lightweight flywheel conversions, premium fuel calibrations and optional Driveblock removal. Every chip is matched to the correct Bosch DME to ensure perfect compatibility and maximum performance.