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Design 911 Design 911 supply Porsche parts, Porsche spares and Porsche accessories, to both retail and to the trade. Our Porsche product and accessory range includes brakes, exhausts, tyres, wheels and Porsche panels and interiors. https://design91.uk/images/schemaLogo.png https://design91.uk/images/schemaLogo.png +443456003478 https://design91.uk Facebook Instagram

Demon Speed

About Demon Speed

Experience the Demon Speed Difference: When it comes to motorsport, every advantage counts. Demon Speed Motorsports is committed to top-tier Porsche products so, whether you’re a seasoned racer or an aspiring track champion, Demon Speed Motorsports is your ultimate destination for Porsche Cup Car racing parts. 

Discover the adrenaline rush that comes with uncompromising performance – explore our catalogue now and ignite your racing passion like never before.

DISPLAYING 1 to 16 (of 18 products)
1 2
Best Price
DSM-EMT-KIT
Product Information
Product Information
Upgrade your Porsche's performance with Demon Speed’s GT3 Cup Style Solid Engine Mounts. These mounts provide superior engine stability, sharper handling, and improved power transfer for track enthusiasts and professional racers.

demonspeed

Fits:
Porsche 996 GT3 Cup Car 
Porsche 997 GT3 Cup Car 

--Only in conjunction with Demon Speed's RSR Engine Blade (see below)--
Porsche 996 Turbo/GT2 2001-05
Porsche 996 GT3/GT3 RS 1999-05
Porsche 997.1 Turbo 2007-09
Porsche 997 GT2/GT2 RS 2007-12
Porsche 997 GT3/GT3 RS 2007-09

These engine mounts are specifically designed as a direct replacement for 996/997 GT3 Cup Cars, though can be fitted to 996/997 Turbo and road-legal GT3 models when paired with Demon Speed's RSR Engine Blade. When adding these mounts to your basket, you will be given the option to include this add-on with your purchase. 

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

DSM-EMT-KIT
99337504907
99337504909
99637504990
99637504991
99737504905
99737504907
99737504906
99737504908
99737504991
99634512290
99634512190
99637512190
99637512290

The product you are viewing cross references to these numbers
Best Price
JTC9962C2
Product Information
Product Information
Front bumper splitter 3-piece. 

demonspeed

Fits:

Porsche 996 Carrera 2 - 2002 to 2005

Transform your Porsche 996 Carrera (C2) into a high-performance masterpiece with our meticulously engineered Front Splitter. Crafted with precision and a dedication to excellence, this aftermarket accessory is designed to elevate both the performance and style of your Porsche.

Key Features:

  • Aerodynamic Excellence: Our Front Splitter is expertly crafted to enhance the aerodynamics of your Porsche 996, providing increased downforce and stability at high speeds. Bid farewell to lift and welcome superior handling.
  • Premium Build: Constructed from top-tier materials, our splitter is engineered to endure the demands of spirited driving and track sessions. Lightweight yet robust, it’s the ideal addition for drivers focused on performance.
  • Effortless Installation: Engineered for easy installation, our Front Splitter includes all necessary hardware and detailed instructions. No need for extensive modifications or specialized tools—install it swiftly and hit the road.
  • Tailored Fit: Specifically tailored for the Porsche 996 Carrera (C2), our splitter seamlessly integrates with your vehicle’s front bumper, delivering a sleek and aggressive appearance that enhances the car’s original design.
  • Aesthetic Enhancement: Beyond its functional benefits, our Front Splitter adds a touch of sophistication and race-inspired flair to your Porsche. It’s a guaranteed way to set your vehicle apart from the rest.

Take your Porsche 996 Carrera (C2) to new heights of performance and visual allure with our premium Front Splitter. Experience improved aerodynamics, enhanced stability, and a more aggressive aesthetic, whether you’re cruising the streets or tearing up the track.

Upgrade your driving experience today with Demon Speed’s Joe Toth Porsche 996 Carrera (C2) Front Splitter. Don’t let this opportunity slip by—transform your Porsche into a head-turning, high-performance machine.

Order now and discover the remarkable difference a precision-crafted splitter can make in your Porsche’s performance and aesthetics.

Please Note: This splitter is comprised of three pieces.



Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

JTC9962C2
99650531106G2X

The product you are viewing cross references to these numbers
Best Price
DSM-THD-991-SET
Product Information
Product Information

Hold down wheel nut set for transportation.
Sold as a set for one car -  (2 x Left, 2 x Right)

demonspeed

Fits:
Porsche 991 GT3 Cup with Centrelock wheels
Porsche 992 Cup with Centrelock wheels

Description

The body of the hold down is zinc and black coated and the stickers are color coded the same as the wheel washers to identify the left and right threads.
Similar to 9973616099A / 9973616109A and WHS001857 / WHS001858

Red - Left hand
Blue- Right hand

Best Price
RPL-991
Product Information
Product Information
Restrictor plate kit. Porsche 997 Cup / Porsche 991 Cup

demonspeed

Fits:
Porsche 997 GT3 Cup
Porsche 991 GT3 Cup 

These restrictors mount over the front of the intake throttle body and under the intake boot.

Take Control with Our Restrictor Plate Kit
Harness the power of your vehicle with our Restrictor Plate Kit. It’s designed for the late 997 and 991 air filter system. These precision machined restrictors mount over the front of the intake throttle body and under the intake boot.

What’s Included in Your Purchase
Your purchase includes a set of 10 distinct restrictor plates. This array provides a variety of restriction options. Hence, you can fine-tune your vehicle’s horsepower to your exact needs. This ensures optimal performance for any scenario.

This includes a set of 10 plates that fit over the front of the throttle housing under the intake boot.  Easy to install and easy to remove as needed.

Ideal for NASA GTS Preparations
Are you prepping for NASA GTS? Our Restrictor Plate Frame is the perfect tool for you. It allows precise horsepower calibration. Consequently, you can achieve your desired performance level each time. We’ve tested this plate frame on a 996 cup car with fantastic results. The horsepower reduced smoothly, and the air/fuel ratio remained unaffected.

Why Choose Our Restrictor Plate Kit
Our Restrictor Plates offers precise horsepower control. It’s a must-have for racing enthusiasts and those seeking to tailor their vehicle’s performance. Experience the difference of custom tuning with this reliable, efficient tool. Invest in our Restrictor Plates and experience the thrill of tailored performance today.

Fits all 997 Cup and all 991 Cup

Best Price
9F1401111
Product Information
Product Information
Drive Pin brake disc. 
Sold each - 5 required per disc

demonspeed

Fits:
Porsche 991 GT3 Cup with Centrelock wheels
Porsche 992 Cup with Centrelock wheels

Description

Centerlock Wheel Drive Pin

These pins can wear over time and become damaged when changing wheels allowing more wheel movement than desired.

Similar to Porsche part number 991.341.705.8A and 9F1401111  



Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

9F1401111
9913417058A
9F1401111

The product you are viewing cross references to these numbers
Best Price
DSM-THTD-991
Product Information
Product Information
Hold down wheel nut for transportation. 
Sold each - 4 required per car (2 x Left, 2 x Right)

demonspeed

Fits:
Porsche 991 GT3 Cup with Centrelock wheels
Porsche 992 Cup with Centrelock wheels

Description

The body of the hold down is zinc and black coated and the stickers are color coded the same as the wheel washers to identify the left and right threads.

Similar to 9973616099A / 9973616109A and WHS001857 / WHS001858

Red - Left hand
Blue- Right hand



Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

DSM-THTD-991
9973616099A
9973616109A

The product you are viewing cross references to these numbers
Best Price
PMNA-THD-DT
Product Information
Product Information
Hold down wheel nut drive tool. 

demonspeed

Fits:
Porsche 991 GT3 Cup with Centrelock wheels
Porsche 992 Cup with Centrelock wheels

Description

A unique tool that drives the 991 / 992 wheel hold down nuts on with a 3/4″ drive.
Applies to the DSM hold down nuts and 9973616099A / 9973616109A and WHS001857 / WHS001858



Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

PMNA-THD-DT
9973616099A
9973616109A

The product you are viewing cross references to these numbers
Best Price
DL-WW-9972
Product Information
Product Information
Wheel washer centerlock wheel.
Sold each 

demonspeed

Fits:
Porsche GT3 Cup 997.2 with Centrelock wheels

Similar to Porsche Motorsports Part Number

9973611139A / 9973611139B




Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

DL-WW-9972
9973611139A
9973611139B

The product you are viewing cross references to these numbers
Best Price
DSM-NUT-9972
Product Information
Product Information
Wheel lug nut centerlock wheel. 
Sold each 

demonspeed

Fits:
Porsche GT3 Cup 997.2 with Centrelock wheels

Similar to Porsche Motorsports Part Number

9973616759B




Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

DSM-NUT-9972
9973616759B

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Best Price
DSM-9972CLB
Product Information
Product Information
Cup Stub Axle Centerlock Central Axle Bolt. This is a wear item and the threads will flow outward after continuous torqueing. Don't wait for a failure!
Sold each

demonspeed

Fits: 
Porsche 997.2 Cup Cars with Centerlock Wheels

Made from High Strength 4140 Steel Alloy Heat Treated.

After wear and tear has taken its toll on the center bolt, the threads can become deformed. This is an item that should be changed frequently.

Similar to  997.331.571.9A



Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

DSM-9972CLB
9973315719A

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Best Price
DSM-991QGW
Product Information
Product Information
Rear 1/4 window GT3 Cup style. 

demonspeed

Fits:
Porsche 991.1 Coupe - 2012 to 2016

High quality Lexan polycarbonate window.  
CNC cut, formed and black out covering to match the original window.

OEM Hardcoat Finish

This window has the screw in 991.2 style retention pins, so replace your 991.1 windows with the problematic glue on pins.



Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

DSM-991QGW
99154311100
9915431110003C
9915431120003C
99154311200
99154311102
99154311102V09
99154311202
99154311202V09
99154311103
9915431110303C
99154311203
9915431120303C

The product you are viewing cross references to these numbers
Best Price
DSM-EMGMT
Product Information
Product Information
Demon Speed Motorsports is proud to present the RSR-styled Engine Mount Carrier, specifically designed for 996/997 Turbo, GT3, and Cup cars.

demonspeed

Fits:
Porsche 996 GT3 Cup Car 
Porsche 997 GT3 Cup Car 
Porsche 996 Turbo/GT2 2001-05
Porsche 996 GT3/GT3 RS 1999-05
Porsche 997.1 Turbo 2007-09
Porsche 997 GT2/GT2 RS 2007-12
Porsche 997 GT3/GT3 RS 2007-09

Stronger than the original, this engine plate is crafted from stainless steel with high-quality 7075 aluminum bolt-on mountings, making it a superior alternative to the factory-stamped steel plate prone to fatigue and failure.

Click 'Zoom in' for large parts diagram.
Diagram Ref No 1.

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

DSM-EMGMT
99637501300
99637501301
DSM-EMTL
DSM-EMTR
3609309625KIT
M18
624
M08

The product you are viewing cross references to these numbers
Best Price
DSM-CLCP993
Product Information
Product Information
Porsche Motorsports Style Center lock Conversion Package   4 sets Front & Rear 
 
demonspeed

This package is to convert the entire 993.

Fits:
Porsche 993
Best Price
DSM-CLCP
Product Information
Product Information
Porsche Motorsports Style Center lock Conversion Package

This package is for whole car.  4 sets Front & Rear 

This includes the components needed to convert to Porsche Cup 996 and 997.1 style centerlock.

Fits:
Porsche 996, 997, 986, 987, Cayman
Best Price
DSM-DL-LP
Product Information
Product Information
Lock Pot for the center of the wheel hub for use with centerlock wheels Cup racing assembly.

demonspeed

Same great size and fit as the original that is no longer available.

Replaces 96434167570.

Fits:
Porsche 996/997 GT3 Cup 2000 - 2012

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

DSM-DL-LP
96434167570

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Best Price
DL-DP
Product Information
Product Information
Centerlock wheel drive pin with bolt.
Replaces factory part number 96434161480

demonspeed

Fits: Porsche 964 / 993 / 996 / 997

These pins can wear over time and become damaged when changing wheels allowing more wheel movement than desired.

Priced as each

Carry spares & replace them when changing axles!

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

DL-DP
96434161480

The product you are viewing cross references to these numbers
DISPLAYING 1 to 16 (of 18 products)
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