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  1. Weird Metallic Sound

    Hello all, This is my first post on the forums! I have a 2015 Gt and it has 78k miles on it, I recently had kooks long tube headers installed with cats, they connected it into corsas through an oem connection because the aftermarket connect wasn’t long enough. When I got it back I’m 90% sure...
  2. NEW NEW NEW Lethal Performance Headers By Kooks!!

    Hey, ALL! Happy Wednesday! That's right, NOW AVAILABLE is our ALL NEW Lethal Performance Headers, by Kooks. Works for all 2015-2024 Year Models! 1 7/8" x 3" Stainless Steel Long Tube Headers Includes Stainless Steel Off Road Connection Pipes for OEM Cat Back Connection All O2 Bungs And...
  3. NEW NEW NEW Lethal Performance Headers By Kooks!!

    Hey, ALL! Happy Wednesday! That's right, NOW AVAILABLE is our ALL NEW Lethal Performance Headers, by Kooks. Works for all 2015-2024 Year Models! 1 7/8" x 3" Stainless Steel Long Tube Headers Includes Stainless Steel Off Road Connection Pipes for OEM Cat Back Connection All O2 Bungs And...
  4. NEW NEW NEW Lethal Performance Headers By Kooks!!

    Hey, ALL! Happy Wednesday! That's right, NOW AVAILABLE is our ALL NEW Lethal Performance Headers, by Kooks. Works for all 2015-2024 Year Models! 1 7/8" x 3" Stainless Steel Long Tube Headers Includes Stainless Steel Off Road Connection Pipes for OEM Cat Back Connection All O2 Bungs And...
  5. Kooks Sale at Lethal Performance!

    Hey Guys! The Kooks sale just went live, so do not miss your chance to save 10% on Kooks exhaust and products! We included an even more special sale on the popular 1-7/8 Headers (SKU#: 1151H411), so be sure to check that out as well! This sale will be valid for all of March and will end on...
  6. Kooks Sale at Lethal Performance!

    Hey Guys! The Kooks sale just went live, so do not miss your chance to save 10% on Kooks exhaust and products! We included an even more special sale on the popular 1-7/8 Headers (SKU#: 1151H411), so be sure to check that out as well! This sale will be valid for all of March and will end on...
  7. Texas WTB: Kooks or ARH Offroad Longtube Headers

    I have a set of ARH on order but huge lead time with most header companies. Looking for a set of either Kooks or ARH headers with offroad connection pipes. Located in DFW, TX.
  8. Massachusetts KOOKS 1-7/8 full length headers with GREEN catted mid-pipe

    They are used with about 1000 miles on them..Fit 2015-23 5.0 GT..Come with gaskets and bolts. I bought them for my car but selling car after winter and not going to bother. Prefer not to ship but local pick up price $2200. or shipped $2450. Over $3100 new.... Cash in person or Paypal if...
  9. Advice and Questions for Headers

    Hello, folks! First time poster. I have a 2019 GT. I'm looking to get 1-7/8 inch Stainless Power catted headers paired with my 3 inch Borla Atak system. Need some advice and a few questions answered before I go ahead and do it.... 1.) Most importantly, I was told with a tune and catted long...
  10. No rear o2 Holes in Headers

    I have a 2015 Mustang GT. With Texas Speed Longtube headers that have a catted connection. I’ve noticed that there’s only o2 bungs before the cats themselves and not after. Do i get holes threaded in? is this intentional? If i get a tune, will i have to get dummy connectors? i’m all new to this.
  11. clutch feel when hot

    what's up everyone, I just got a 2015 mustang GT with the performance pack and the mt82. so far, I've done headers and the car came with a JLT intake I'm going to tune the car next week. I'm having a small issue where when the car gets hot after sitting in traffic my clutch starts to grab really...
  12. Input on Headers + E85/93 Flex Fuel Tune

    Hello all, I have been enjoying my 2022 Mach 1 HP as is with a simple H pipe for around 7,500 miles since I purchased it in December of 2022. That being said, I'm looking to wake the car up with catted headers and a e85/93 tune. I have the following questions: - Kooks, Stainless Works or BBK ...
  13. Stainless Catted Headers Not Fitting? (2020 Mustang GT)

    Is anyone having a problem with stainless power catted headers not fitting? I bought a pair for my 2020 Mustang GT and the shop has tried moving the motor mounts and all and it still will not fit the passenger side. The driver side fit fine. We sent the part to stainless and they claim it fits...
  14. Texas Speed Headers w/ Connection Pipes IN STOCK!!

    Hey, Morning Everyone! We have plenty of our Texas Speed Headers for 2015+ Mustang GT available and ready to ship out to you! Connection pipe options with a Factory connect to bolt up to most aftermarket cat-backs. If you're ready to add a little more horsepower and add more sound, look no...
  15. Texas Speed Headers w/ Connection Pipes IN STOCK!!

    Hey, Morning Everyone! We have plenty of our Texas Speed Headers for 2015+ Mustang GT available and ready to ship out to you! Connection pipe options with a Factory connect to bolt up to most aftermarket cat-backs. If you're ready to add a little more horsepower and add more sound, look no...
  16. Texas Speed Headers w/ Connection Pipes IN STOCK!!

    Hey, Morning Everyone! We have plenty of our Texas Speed Headers for 2015+ Mustang GT available and ready to ship out to you! Connection pipe options with a Factory connect to bolt up to most aftermarket cat-backs. If you're ready to add a little more horsepower and add more sound, look no...
  17. Stainless Works for 2021-2023 Ford F-150 5.0’s is here!! Check it out!!

    Hey, ALL! Stainless Works’ Exhaust Lineup for the 2021-2023 Ford F-150 5.0’s is here! From their FULL 3 inch Cat-Back Exhausts with sound level and exit options, Stainless Works has you covered from tailpipe to manifold, along side their 1-7/8" Headers with Y-Pipe. Stainless Works Long...
  18. Stainless Works for 2021-2023 Ford F-150 5.0’s is here!! Check it out!!

    Hey, ALL! Stainless Works’ Exhaust Lineup for the 2021-2023 Ford F-150 5.0’s is here! From their FULL 3 inch Cat-Back Exhausts with sound level and exit options, Stainless Works has you covered from tailpipe to manifold, along side their 1-7/8" Headers with Y-Pipe. Stainless Works Long...
  19. Good Shops in Metro Detroit to Install Long Tubes

    Any places that do a good job with S550 header installs? Have read the long tubes are a pain to install so I’d like a shop that does them on the regular
  20. Stainless Power Hi flow cats gas smell

    Has anyone ran Stainless Powers hi flow cats? I am currently catless and the gas smell sucks. I am only going to be NA.


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