Kooks 1156H630 Long Tube Headers GREEN Catted Kit for 20-22 Ford Mustang GT500

Vehicle Fitment

• 2020-2022 Ford Mustang Shelby GT500 (S550, 5.2L Predator Supercharged V8)

Fitment Notes

• No additional parts required -- kit connects directly to OEM exhaust via included adapters
• NOT legal for street use in California -- no CARB EO exemption
• Kooks warranty void on products purchased through unauthorized vendors (including Amazon and Maryland Speed)

Features

• 2" mandrel-bent T304 stainless steel primary tubes
• 3/8" thick laser-cut stainless flanges -- warp-resistant, leak-free seal
• Kooks scavenging spike in every collector -- maximizes exhaust flow
• GREEN Catted connection pipes -- 400 CPSI metallic substrate, EPA-spec, forced-induction rated to 750 RWHP
• OEM adapters included -- connects to factory exhaust without modification
• Handcrafted in the USA (Statesville, NC)
• Dyno and race tested
• Limited lifetime warranty to original purchaser

Specifications

• Primary tube diameter: 2"
• Outlet diameter: 2.75"
• Collector/connection pipe diameter: 3"
• Material: T304 stainless steel
• Flange thickness: 3/8"
• GREEN Cat rating: 400 CPSI, up to 750 RWHP
• Emissions: NOT CARB legal -- off-highway/competition use only
• Warranty: Limited lifetime (original purchaser)

Included Components

• 2x long tube headers (driver and passenger side)
• GREEN Catted connection pipes with OEM adapters
• O2 sensor extension harnesses
• Cometic header gaskets
• Stage 8 locking header bolts
• All installation hardware

Product Description

The Kooks 1156H630 is a long tube header and GREEN Catted connection kit for the 2020-2022 Ford Mustang Shelby GT500 with the 5.2L supercharged Predator V8. The 2" mandrel-bent T304 stainless primaries feed into 3" collectors, replacing the restrictive factory manifolds to improve exhaust scavenging and increase horsepower and torque through the RPM range. Each collector features Kooks' proprietary scavenging spike for maximum velocity and flow.

The GREEN Catted connection pipes use a 400 CPSI metallic substrate rated to 750 RWHP and built to EPA specifications -- purpose-engineered for forced-induction applications like the supercharged GT500 platform. All hardware is included: O2 extensions, Cometic gaskets, Stage 8 locking bolts, and OEM adapters for direct connection to the factory mid-pipe, so no additional parts are required. Flanges are 3/8" thick laser-cut stainless and hand-ground for a smooth, restriction-free port. Entirely handcrafted in Statesville, NC. Not legal for street use in California.