The Kooks 11323500 3" x 2-1/2" Stainless Steel Catted H-Pipe features durable, high-flow Kooks GREEN Cats for improved performance and emissions compliance. Perfect for 2007-2010 Ford Mustang Shelby GT500 owners seeking enhanced horsepower, aggressive sound, and long-term reliability.
Physical products may be returned within 30 days for any reason, provided that the product has not been installed and is in brand new, unused condition with the original packaging. Once a product has been installed, it is non-refundable.
Digital Products, such as MPT Tunes and HP Tuners Credits, are not covered by this.
Please see our Refund Policy or contact an MPT Expert for more information.
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Proposition 65 (Safe Drinking Water and Toxic Enforcement Act of 1986) is a California law that applies to all companies selling products in California. Proposition 65 requires warnings if a product contains any listed chemical present above very low levels that are known to cause cancer, birth defects or other reproductive harm. Proposition 65’s warning standards are among the most stringent in the world. Proposition 65 is not a product safety law, but rather a “right-to-know” law. Businesses are required to provide warnings to comply with Proposition 65. These warnings are required to be in place for all products offered for sale in California.
There are over 800 chemicals on the Proposition 65 list, which is administered by California's Office of Environmental Health Hazard Assessment (OEHHA), a part of the California Environmental Protection Agency. The list includes naturally occurring and man-made chemicals. Proposition 65 warnings can be seen for a wide variety of everyday consumer products, including Automotive Performance products, and warnings can be seen posted throughout California in a variety of establishments such as hotels, restaurants, automobile dealerships/repair shops, and retail stores just to name a few.
To comply with the requirements of Proposition 65, this warning is present on all products sold by MPT.
More detailed information can be found by going to:
https://www.p65warnings.ca.gov/
The Kooks 11323500 3" x 2-1/2" Stainless Steel Catted H-Pipe is an upgraded performance solution designed specifically for the 2007-2010 Ford Mustang Shelby GT500 with a 5.4L engine. Building on Kooks’ legacy of quality and performance, this new H-pipe comes with Kooks GREEN Cats, the next generation of catalytic converters engineered to handle up to 750 RWHP while maintaining excellent emissions compliance. The previous standard cats have been replaced by these more durable, EPA-verified GREEN Cats, ensuring superior performance, reliability, and long-term efficiency.
Crafted from 304 stainless steel, this high-flow H-pipe optimizes exhaust flow for improved horsepower and torque. With a 3" diameter inlet and 2-1/2" OEM outlet, it offers a perfect fit with the stock exhaust system, making it ideal for enthusiasts looking to enhance the sound and power of their GT500 without sacrificing quality. The high-flow GREEN Cats ensure maximum exhaust flow, resulting in better engine performance while meeting stringent emissions standards. The result is an aggressive exhaust note and performance gains that complement your vehicle's power.
The installation of the Kooks 11323500 Catted H-Pipe is straightforward and can be completed in around 2-3 hours with basic hand tools. The direct bolt-on design makes it easy for both DIY enthusiasts and professional installers. No special modifications are necessary, and the part is designed to fit seamlessly with your vehicle’s OEM exhaust components.
For any questions or to report inaccuracies in the product description, contact the MPT Performance experts at (407) 636-7077 or by email.
MPT is proud to offer free shipping on most orders over $149.
Turnaround Times:
Special Considerations:
A Return Authorization Number is required for all returns. Please contact an MPT Expert to obtain an RA # before sending anything back to us for any reason.
MPT tuning charges and license fees are Non-Refundable. The sale is final when MPT has sent the tune file over email. This includes both new tune purchases and tune updates.
Products other than MPT tunes, digital products, and MPT decals may be returned within 30 days for any reason, provided that the product has not been installed and is in brand new, unused condition with the original packaging. Once a product has been installed it is non-refundable. We reserve the right to deny the return, should the product be received and it display signs of installation or unmentioned damage.
For vehicle programmers/tuners, the vehicle must be returned to stock if a program was installed. If a tuning device is returned and has not been returned to stock, a refund will not be issued, and your tuner will not be sent back without a shipping and handling fee.
The customer is responsible for all shipping charges incurred during the return process.
Amount Refunded:
•Returns post marked before 30 days from the date the item was received will be refunded the purchase price, minus a 25% restocking fee and the cost of shipping.
•After 30 days, all sales are Final.
•Shipping charges along with any package insurance are non-refundable. If your purchase was shipped with our Free Shipping option, the cost of the shipping will be subtracted from the total refund amount.
HP Tuners Credits are assigned to the HP Tuners product with the submitted serial number and cannot be transferred. Once you load a tune to your vehicle with the RTD, these credits are Non-Refundable.
Digital products and files that have no ability to be taken back physically, such as an SCT Tuner Unlock, are Non-Refundable.
nGauge Tune License Fee is included in your initial purchase of MPT tunes for the nGauge. This fee is factored into the price of the tunes and becomes Non-Refundable when the stock file has been emailed to MPT.
MPT Decals are Non-Refundable, once they have been received by the customer.
Year | Make | Model | Submodel |
---|---|---|---|
2007-2010 | Ford | Mustang Shelby GT500 |
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