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Demon Speed
Demon Speed for Porsche
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.
A Quick Look at Demon Speed
Demon Speed information on this page is based on details supplied by the manufacturer or distributor, plus any OE references provided with the parts.
Choosing the Right Fit for Your Porsche
Where Demon Speed is listed for Porsche, use the supplied model coverage and OE references to confirm suitability. Check details that commonly affect fitment such as model year, side/position, and connector type where relevant.
- Typical reasons to choose these parts include moving to a more aggressive setup, improving response and styling, or replacing tired components with uprated alternatives.
- Be aware that firmer or more focused parts can increase noise, vibration and harshness, and may accelerate wear if used hard without suitable supporting upgrades.
- Watch for symptoms such as inconsistent fitment, new noises or vibration after installation, or rapid wear when components are mixed or incorrectly set up.
- Consider whether supporting modifications are recommended for your intended use, and confirm compatibility before ordering.
- Set expectations around comfort and NVH when choosing more track-focused components, especially on cars that still see road use.
- After fitting, re-check fasteners and settings, and address any warning signs such as rubbing, knocking or uneven tyre wear.
Browse by Category
If you already know the area you are working on, start with the category and then filter by Porsche model. Where real-world symptoms and typical reasons to replace are provided, use them to keep the wording grounded.
Brakes — Brake components are renewed to restore stopping performance, address wear or upgrade a Porsche for fast road or track use. Common symptoms include vibration under braking, increased stopping distances, squealing, pulling to one side, warning lights and visible wear to discs and pads.
- Check which Porsche models and brake setups a kit is intended for, and whether pads, discs and fitting hardware are included.
- Follow the recommended bedding-in procedure and consider replacing discs and pads together if wear is significant.
Pin Kit and Guide Plates — Pad retaining pins and guide plates are replaced to ensure pads move freely and are securely retained in Porsche calipers, helping to prevent uneven wear and brake noise.
- Confirm the kit is correct for your specific caliper type and whether it covers one caliper or an axle set.
- Inspect old hardware for corrosion or seizure and clean and lubricate contact points appropriately during assembly.
Suspension & Axle — Suspension and axle parts are replaced to restore handling, ride comfort, braking stability, and safety, or to move towards a firmer, more controlled setup where desired.
- Look out for knocking over bumps, uneven tyre wear, wandering, vibration, pulling under braking, sagging ride height or clunks during acceleration and direction changes.
- Plan for an alignment after suspension work and prioritise diagnosing play and wear rather than replacing parts at random.
Wheel Accessories — Wheel accessories are replaced to improve security, correct fitment, and finish, or to refresh worn bolts, nuts, caps, valves, spacers and related hardware.
- Check seat type, length and thread of bolts or nuts to match your wheels and hubs, and ensure spacers are hub-centric where required.
- Use a torque wrench on wheel hardware, re-torquing after initial driving, and address any vibration or wobble promptly.
Centre Locking Wheel Parts — Centre-lock parts are replaced to maintain safe clamping and correct operation on centre-lock equipped Porsche models, particularly where cars see regular wheel changes or track use.
- Inspect for loosening centre locks, clicking noises, worn mating faces, damaged threads or corrosion, and follow the correct torque procedure.
- Use the correct tools for loosening and tightening, and recheck torque after bedding-in or intensive use.
Explore Demon Speed at Design911
View the current Demon Speed range for Porsche at Design911, then filter by model and category to narrow down to the right parts.
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
The product you are viewing cross references to these numbers
- Porsche 996 TURBO 2000-05
- Porsche 996 GT2 2001-05
- Porsche 996 GT3 MKI 1999-02
- Porsche 996 GT3 MKII 2003>>
- Porsche 996 GT3 RS 2003-04
- Porsche 997 MK1 TURBO 2007-09
- Porsche 997 MK1 GT3 2007-09
- Porsche 997 MK1 GT2 2007-09
- Porsche 997 MKII GT2 RS 2011-13
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:
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
The product you are viewing cross references to these numbers
- Porsche 996 C2 3.6L 09/01-2005
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Hold down wheel nut set for transportation.
Sold as a set for one car - (2 x Left, 2 x Right)
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
- Porsche 991.1 GT3 3.8L (475Bhp) 2014-16
- Porsche 991.2 GT3 4.0L (500 Bhp) / GT3 RS 4.0L (520 Bhp) 2017-19
- Porsche 992.1 GT3 4.0L / 992 S/T 4.0L 2021-24
- Porsche 992.1 GT3 RS 4.0L 2022-24
.webp?width=197&height=148&format=webp "Restrictor plate kit. Porsche 997 Cup / Porsche 991 Cup - RPL-991")
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
- Porsche 997 MKII GT3 2010-11
- Porsche 991.1 GT3 3.8L (475Bhp) 2014-16
- Porsche 991.2 GT3 4.0L (500 Bhp) / GT3 RS 4.0L (520 Bhp) 2017-19
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12 Month Warranty
Worldwide Delivery
Sold each - 5 required per disc
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
The product you are viewing cross references to these numbers
- Porsche 991.1 GT3 3.8L (475Bhp) 2014-16
- Porsche 991.2 GT3 4.0L (500 Bhp) / GT3 RS 4.0L (520 Bhp) 2017-19
- Porsche 992.1 GT3 4.0L / 992 S/T 4.0L 2021-24
- Porsche 992.1 GT3 RS 4.0L 2022-24
Shop Securely
12 Month Warranty
Worldwide Delivery
Sold each - 4 required per car (2 x Left, 2 x Right)
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
The product you are viewing cross references to these numbers
- Porsche 991.1 GT3 3.8L (475Bhp) 2014-16
- Porsche 991.2 GT3 4.0L (500 Bhp) / GT3 RS 4.0L (520 Bhp) 2017-19
- Porsche 992.1 GT3 4.0L / 992 S/T 4.0L 2021-24
- Porsche 992.1 GT3 RS 4.0L 2022-24
Shop Securely
12 Month Warranty
Worldwide Delivery
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
The product you are viewing cross references to these numbers
- Porsche 991.1 GT3 3.8L (475Bhp) 2014-16
- Porsche 991.2 GT3 4.0L (500 Bhp) / GT3 RS 4.0L (520 Bhp) 2017-19
- Porsche 992.1 GT3 4.0L / 992 S/T 4.0L 2021-24
- Porsche 992.1 GT3 RS 4.0L 2022-24
Shop Securely
12 Month Warranty
Worldwide Delivery
Sold each
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
The product you are viewing cross references to these numbers
- Porsche 997 MKII GT3 2010-11
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12 Month Warranty
Worldwide Delivery
Sold each
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
The product you are viewing cross references to these numbers
- Porsche 997 MKII GT3 2010-11
Shop Securely
12 Month Warranty
Worldwide Delivery
Sold each
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
The product you are viewing cross references to these numbers
- Porsche 997 MKII GT3 2010-11
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12 Month Warranty
Worldwide Delivery
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
The product you are viewing cross references to these numbers
- Porsche 991.1 Carrera C2 3.4L (350Bhp) 2012-16
- Porsche 991.1 Carrera C2S / GTS 3.8L (400/430 Bhp) 2012-16
- Porsche 991.1 Carrera C4 3.4L (350Bhp) 2012-16
- Porsche 991.1 Carrera C4S / GTS 3.8L (400/430 Bhp) 2012-16
- Porsche 991.1 Turbo 3.8L (520bhp) 2014-16
- Porsche 991.1 Turbo S 3.8L (560Bhp) 2014-16
- Porsche 991.1 GT3 3.8L (475Bhp) 2014-16
- Porsche 991.1 GT3 RS 4.0L (500Bhp) 2015-16
Shop Securely
12 Month Warranty
Worldwide Delivery
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
The product you are viewing cross references to these numbers
- Porsche 996 TURBO 2000-05
- Porsche 996 GT2 2001-05
- Porsche 996 GT3 MKI 1999-02
- Porsche 996 GT3 MKII 2003>>
- Porsche 996 GT3 RS 2003-04
- Porsche 997 MK1 TURBO 2007-09
- Porsche 997 MK1 GT3 2007-09
- Porsche 997 MK1 GT2 2007-09
- Porsche 997 MKII GT3 2010-11
- Porsche 997 MKII GT2 RS 2011-13
Shop Securely
12 Month Warranty
Worldwide Delivery
This package is to convert the entire 993.
Fits:
Porsche 993
- Porsche 993 (911) C2 1994-97
- Porsche 993 (911) C4 1994-97
- Porsche 993 (911) RS 1994-97
- Porsche 993 (911) C2S 1994-97
- Porsche 993 (911) C4S 1994-97
- Porsche 993 (911) TURBO 1994-96
- Porsche 993 (911) GT2 1994-97
- Porsche 993 (911) TURBO S 1994-97
- Porsche 997 MKII GT2 RS 2011-13
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12 Month Warranty
Worldwide Delivery
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
- Porsche Boxster 986 2.5L 1997-99
- Porsche Boxster 986 2.7L 1999-02
- Porsche Boxster S 986 3.2L 1999-02
- Porsche Boxster 986 2.7L 2003-04
- Porsche Boxster S 986 3.2L 2003-04
- Porsche Boxster 987 2.7L 2005 -08/08
- Porsche Boxster 987 S 3.2/3.4L 2005-08/08
- Porsche Boxster 987 MKII 2.9L 2009-2012
- Porsche Boxster S 987 MKII 3.4L 2009-2012
- Porsche 996 C2 3.4L 1997-08/01
- Porsche 996 C4 3.4L 1997-08/01
- Porsche 996 C2 3.6L 09/01-2005
- Porsche 996 C4 3.6L 09/01-2005
- Porsche 996 C4S 3.6L 09/01-2005
- Porsche 996 TURBO 2000-05
- Porsche 996 GT2 2001-05
- Porsche 996 GT3 MKI 1999-02
- Porsche 996 GT3 MKII 2003>>
- Porsche 996 GT3 RS 2003-04
- Porsche 997 MK1 Carrera 2 3.6L 2005-08
- Porsche 997 MK1 Carrera 2S 3.8L 2005-08
- Porsche 997 MK1 Carrera 4 3.6L 2005-08
- Porsche 997 MK1 Carrera 4S 3.8L 2005-08
- Porsche 997 MK1 TURBO 2007-09
- Porsche 997 MK1 GT3 2007-09
- Porsche 997 MK1 GT2 2007-09
- Porsche 997 MKII Carrera C2 3.6L 2009-12
- Porsche 997 MKII Carrera C4 3.6L 2009-12
- Porsche 997 MKII Carrera C2S 3.8L 2009-12
- Porsche 997 MKII Carrera C4S 3.8L 2009-12
- Porsche 997 MKII GT3 2010-11
- Porsche 997 MKII Turbo 2010-13
- Porsche 997 MKII GT2 RS 2011-13
- Porsche Cayman 2.7L 987C 2006-08
- Porsche Cayman S 3.4L 987C 2005-08
- Porsche Cayman 2.9L 987C MKII 2009-12
- Porsche Cayman S / R 3.4L 987C MKII 2009-12
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12 Month Warranty
Worldwide Delivery
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
The product you are viewing cross references to these numbers
- Porsche 996 GT3 MKI 1999-02
- Porsche 996 GT3 MKII 2003>>
- Porsche 996 GT3 RS 2003-04
- Porsche 997 MK1 GT3 2007-09
- Porsche 997 MKII GT3 2010-11
Shop Securely
12 Month Warranty
Worldwide Delivery
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Replaces factory part number 96434161480
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
The product you are viewing cross references to these numbers
- Porsche 964 (911) C2 1989-93
- Porsche 964 (911) C4 1989-93
- Porsche 964 (911) RS 3.6L 1991-93
- Porsche 964 (911) RS 3.8L 1991-93
- Porsche 964 (911) TURBO 3.3L 1991-93
- Porsche 964 (911) TURBO 3.6L 1991-93
- Porsche 993 (911) C2 1994-97
- Porsche 993 (911) C4 1994-97
- Porsche 993 (911) RS 1994-97
- Porsche 993 (911) C2S 1994-97
- Porsche 993 (911) C4S 1994-97
- Porsche 993 (911) TURBO 1994-96
- Porsche 993 (911) GT2 1994-97
- Porsche 993 (911) TURBO S 1994-97
- Porsche 996 C2 3.4L 1997-08/01
- Porsche 996 C4 3.4L 1997-08/01
- Porsche 996 C2 3.6L 09/01-2005
- Porsche 996 C4 3.6L 09/01-2005
- Porsche 996 C4S 3.6L 09/01-2005
- Porsche 996 TURBO 2000-05
- Porsche 996 GT2 2001-05
- Porsche 996 GT3 MKI 1999-02
- Porsche 996 GT3 MKII 2003>>
- Porsche 996 GT3 RS 2003-04
- Porsche 997 MK1 Carrera 2 3.6L 2005-08
- Porsche 997 MK1 Carrera 2S 3.8L 2005-08
- Porsche 997 MK1 Carrera 4 3.6L 2005-08
- Porsche 997 MK1 Carrera 4S 3.8L 2005-08
- Porsche 997 MK1 TURBO 2007-09
- Porsche 997 MK1 GT3 2007-09
- Porsche 997 MK1 GT2 2007-09
Shop Securely
12 Month Warranty
Worldwide Delivery
Monday-Friday: 8.30am - 5.30pm (GMT)
Saturday: Closed
Sunday: Closed