JMG have been developing modifications for the Boxster almost since they were released in 1997, much of the tuning products and theories that worked on the earlier 911's had been refined to work with the Boxster. In addition many new products and techniques were also developed.
For the Boxster 2.5, 2.7 and 3.2 Boxster S your now in the right place to view a vast array of tuning possibilities.
In addition to the prices bellow, we can also provide a whole host of other improvements for the Boxster and Boxster S.
The following table shows some of our prices for improvements to the Boxster 986 including parts and labour.

All prices include installation
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Boxster 2.7 |
Boxster 3.2 S |
Klauss Hoffmann - Stage-2 - remap. This remap improves the performance of the 2.5, 2.7 and 3.2 Boxsters in many ways. Most importantly it improves low, midrange and driveability. The great benefit of all Klauss Hoffmann chips is that they are designed to remain flexible to work with other performance enhancements, such as exhaust and intake improvements.
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FILTER STAGE-2 - Performance replacement element
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FILTER STAGE-3 - Performance cone filter
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EXHAUST - STAGE-2 - The Boxster with the correct high performance manifolds, cats and rear silencers can produce the most amazing sound while also gaining small gains in performance. The 9XX silencers are the product of years of development. The 9XX items gain on knowledge gained from ongoing development to produce the best available items.
9XX can also produce cat-bypass sections for the Boxster models, call for details.
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CONVERSION FROM BOXSTER ENGINE TO 996-3.6 ENGINE. Price does not include engine, conversion only.
Used engines sourced by customer with other required used parts cost around £3500.
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From £3995 |
From £3995 |
From £3995 |
BRAKES FRONT - 9XX SPORTS BRAKE UPGRADE - The 9XX sports brake upgrade for the front of a Boxster includes 9XX sports crossdrilled disks, sports pads and uprated brake fluid.
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£595 |
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£695 |
BRAKES REAR - 9XX SPORTS BRAKE UPGRADE - The 9XX sports brake upgrade for the rear of a Boxster includes 9XX sports crossdrilled disks, sports pads and uprated brake fluid.
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£595 |
£595 |
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ON BOARD COMPUTER - Retrofit of on board computer option for cars which left the factory without this option. Includes replacement stalk assembly
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POA |
POA |
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BABY SEAT HARNESS BUCKLE AND AIRBAG REPROGRAM - Supply and fit of Porsche optional baby seat harness system which deactivates the passenger side airbag whenever a baby seat is installed. This modification is installed using all Porsche parts and includes a baby seat buckle to add to non genuine baby seats so they deactivate the system in the same way a genuine seat would.
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POA |
POA |
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CRUISE CONTROL - For models with e-throttle yet without cruise control, we can retrofit the cruise control option including new stalks for your Boxster.
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POA |
POA |
POA |
PSE - PORSCHE SWITCHABLE EXHAUST - We can retrofit the Porsche switchable exhaust system, including electronic exhaust sound switching to cars which left the factory without this expensive option.
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POA |
POA |
POA |
CONVERSION OF STANDARD RADIO/CD TO FULL SCREEN RADIO/CD/SATNAV - At JMG we can convert cars with the standard radio/CD player to having a full screen satnav,radio,cd,DVD system. Just like the expencive Porsche factory option for satnav but at a fraction of the price and with more features (such as bluetooth, DVD,IPOD and more!)
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POA |
POA |
POA |
CONVERSION OF FULL SCREEN SATNAV RADIO/CD to STANDARD SINGLE DIN RADIO/CD SYSTEM. Some customers would prefer to use an aftermarket satnav unit, would like to have the storage tray of the single DIN systems and gain bluetooth, ipod and other features found in many single DIN head units. We can offer a wide range of options for Boxster owners.
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POA |
POA |
POA |
FUEL PUMP - STAGE-3 Motorsport - Our motorsport fuel pump has been tested on cars providing up to 650 lbs of torque. Important in particular with highly modified cars as the standard fuel pumps (when new) only have a safety margin of some 10%. When modifying your 911 your standard fuel pump may run out of capacity causing a lean condition.
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| BEFORE AND AFTER DYNO CHARTS - Should you desire dyno charts before and after modification we are able to provide these at an additional cost as follows. |
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£220 |
£220 |
DYNO TUNING - Charged by the hour we are able to setup your car on a rolling road dyno tester. This is charged by the hour and logs not only BHP and Torque but also boost pressure, air fuel ratio and much more. For a perfectly tuned car this is the only real option to set it up.
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£150/hour |
WIDEBAND AFR DISPLAY- Air fuel ratio guage, with datalogging ability, pod mounted
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Computerised 4 wheel laser alignment to standard or performance settings
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FRONT WISHBONE REBUILD - 9XX Front wishbones remanufactured and improved to the special 9XX specifications racing version with new ball joint and composite bushes. (requires 4 wheel alignment to setup) priced per pair.
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£795 |
£795 |
£795 |
COMPOSITE SUSPENSION BUSHES - 9XX Bushes are available to replace almost any bush within the suspension previously made from rubber. These items will improve controll and driver feedback. Price for these are on application dependent on which bushes you desire to be uprated.
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POA |
POA |
POA |
STRUT BRACES - 9XX strut braces improve the rigidity of the 911 frame allowing more precise handling characteristics with reduced flex and improved driver feedback through the steering and suspension
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POA |
POA |
POA |
ANTI ROLL BARS - STAGE-2 - 30mm front and 19mm rear (adjustable) anti roll bars, with rubber bushes. Alignment recommended,
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POA |
POA |
POA |
FRONT SUSPENSION - STAGE-2 - 9XX Koni/bilstein custom built adjustable shock absorbers for cars without Koni MO30 height adjustable front suspension. Alignment required. Priced per pair.
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POA |
POA |
POA |
FRONT SUSPENSION - STAGE-3 - 9XX Koni/Bilstein custom built adjustable shock absorbers. Both adjustable for shock absorbing and for ride height. Includes fitting springs to suit customers requirements. Alignment required. Priced per pair.
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POA |
POA |
POA |
REAR SUSPENSION - STAGE-2 - 9XX Koni/Bilstein adjustable shock absorbers. Alignment recommended. Priced per pair.
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POA |
POA |
POA |
BREATHER TANK- STAGE-2 - 9XX Breather modification kit. Includes polished billet aluminium oil catch can, breather filter and all fittings.
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£695 |
£695 |
£695 |
BREATHER TANK - STAGE-3 - 9XX Breather modification kit. Includes polished billet aluminium oil catch can, breather filter, oil drainback system, automated valve block, and all fittings.
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Under development |
Under development |
Under development |
CLUTCH - STAGE 2 - 9XX Derived from the Turbo clutch with works modifications. Up to 550 BHP
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Under development |
Under development |
Under development |
CLUTCH - STAGE 3 - 9XX Lightweight aluminium clutch cover with increased finger spring tension, 5mm larger friction plate. Up to 850 BHP
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Under development |
Under development |
Under development |
HEADLIGHT UPGRADE KIT - 9XX Wiring harness, Relays, Relay and fuse box, uprated bulbs. Increases voltage to headlights by 20%, combined with uprated bulbs vastly improves headlight performance.
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£195 |
£195 |
£195 |
ALPINE 2 SPEAKER KIT - Replacement speakers for both speakers (dashboard) Boxster models
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£139 |
£139 |
£139 |
ALPINE 2 SPEAKER KIT WITH ACTIVE BASS UNIT - Replacement speakers for both speakers (Dash) Boxster models, with active bass unit.
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£395 |
£395 |
£395 |
ALPINE 2 SPEAKER KIT WITH ACTIVE BASS - Replacement dashboard speakers for your Boxster models with aditional compact active bass unit.
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£550 |
£550 |
£550 |
CLEAR REAR LIGHT CLUSTERS- 9XX with bulbs, LED Type as per 987 Boxster types. Per pair
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POA |
POA |
POA |
QUICKSHIFT - 9XX RaceShift. Short throw quickshift assembly. All stainless steel construction, aircraft quality rose joints, Very precise gear selection. The race shift is our shortest throw quickshift kit.
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UNDER DEVELOPMENT |
UNDER DEVELOPMENT |
UNDER DEVELOPMENT |
QUICKSHIFT - 9XX RoadShift. Short throw quickshift assembly. All stainless steel construction, aircraft quality rose joints, Very precise gear selection. The roadshift is our quickshift suited to 968 drivers wishing to have a more precise shorter throw action to gear selection, while maintaining a low level of effort for a sports cruising driving style.
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UNDER DEVELOPMENT |
UNDER DEVELOPMENT |
UNDER DEVELOPMENT |
JMG only install parts which are sympathetic to the design philosphy of the original Porsche design while the part also being a noticable improvement over the original parts. We would like to think that if the original design engineers at Porsche were to inspect your car with our parts installed they would not only approve of the parts as an improvement but may also believe they were from the Porsche motorsport division.
To improve your Porsche, call or email us today to arrange any of the above modifications or to discuss your requirements. Tel: 01202 488800
JMG PERFORMANCE MODIFICATIONS SHOULD NOT DEGRADE THE RELIABILITY OF YOUR CAR, HOWEVER SHOULD YOUR CAR HAVE A COMPONENT WHICH HAS AGED OR WORN ITS LIFESPAN FOLLOWING MODIFICATION OF THE CAR MAY BE REDUCED