FAQs

Yes! Kooks offers a Tumbling Service for both New and Used Headers. If you do not have Kooks Headers, we can still help you! The associated cost per Header is $150 + shipping or $300 per set + shipping. Please contact sales@kooksheaders.com for more information!

Please reach out to us via email - sales@kooksheaders.com to learn more about our private label offerings 

The quickest way to get support is to call our technical support line 1-866-586-KOOK (5665). You can also email tech@kooksheaders.com and submit photos to get a detailed response within 24 hours of request. Please note that our current hours are Monday-Friday from 8:00AM-5:00PM Eastern Time. 

Typically in the range of 15 to 20 hp with a tune unless otherwise stated.

Generally yes, but depends on the exact product and vehicle.

We go off the OEM spec and sequence. Treat it like you were torquing down an OEM manifold.

We offer a variety of incentives and packages for partnering with Kooks. Please send us an email at sales@kooksheaders.com or give us a call at 1-866-586-KOOK (5665). 

Yes, they do.  0² extensions will be included if they are required for the vehicle.  Instructions are available under the Resources tab on our website product listing.

More than likely, no. Cats are a lot harder to hurt than most people think. 99% of the time when a P0420 or P0430 are present, especially when it is both at the same time, it is resolved in the tune or by finding an exhaust leak. These codes are a symptom, not the disease, just like a runny nose.

These two cats are physically the same, and both use the same 300 cell high-flow substrate. The difference is in the coating that is applied to the substrate. The coating on the Kooks GREEN Cat has more of the precious metals required to create the proper reaction to function as a catalytic converter in newer vehicle exhaust systems. This coating also helps the cat withstand the increased heat in higher horsepower and forced induction applications. The standard cats carry a 1 year limited replacement warranty (No warranty if used in a forced induction application). The Kooks GREEN Cats carry a 2 year limited replacement warranty.

It depends on the vehicle. We do offer custom builds if our schedule allows and we would need to have the vehicle at our facility. Please contact us to learn more.

Yes, if we have the vehicle here at our facility, we do offer custom builds if our schedule allows. Please contact us to learn more. 

You can utilize our Dealer Locator portal to find a shop that can install product for you. If you have additional questions or issues please just give us a call at 1-866-586-KOOK

An OEM connection point is a specific location on the factory exhaust where this cat-back exhaust or connection pipe will bolt up/connect.

• Performance Cats – not EPA verified, for use on NA applications under 550 RWHP. High flow, 400 cell substrate in 4” cat body.
• GREEN Cats – EPA verified, for use on NA or Forced Induction applications up to 750 RWHP. High flow, 400 cell substrate in 4” cat body.
• Ultra GREEN Cats – EPA verified, for use on NA or Forced Induction applications up to 850 RWHP. Higher flow, 400 cell substrate in 4.5” cat body with additional precious metals to increase emissions control.
• High Output (H.O.) GREEN Cats – EPA verified, for use on NA or Forced Induction applications up to 1,000 RWHP. Highest flow, 300 cell substrate in 4.5” cat body.

Kooks Torque Series & Kooks Super Street

The Kooks Torque Series headers and Kooks Super Street Series headers are designed with for improved performance while maintaining an outlet that will connect to the OEM Catalytic Converter. This allows for maximum performance without interfering with the Emissions Control systems of the vehicle and without requiring a tune. 

Kooks Long Tube

Long Tube headers are designed for maximum performance and will require a Kooks Connection pipe or Kooks Header-Back exhaust system to be used. With Long Tube headers, the OEM Catalytic converters will need to be removed. A tune is required to receive the maximum benefit of the Long Tube Header upgrade.

Usually, there is an internal part within part #11323300.  We do not list these parts on our website but we can sell it if it’s available.

Kooks does offer sponsorships. Please visit our Sponsorship Application page to find the application and we will review and respond as soon as possible.

Head on over to our Kooks Wear store and view our current stick offerings. Don't see one that you want? Shoot us an email at marketing@kooksheaders.com! 

Please reach out to us via email at tech@kooksheaders.com or call us at 1-866-586-KOOK (5665)

Prior to purchasing, please reach out to a Technical Sales Representative to confirm compatibility 1-866-586-KOOK (5665). Our experts will be able to make sure what you're purchasing is the right item.  

Basic hand tools are all that is needed. My personal recommendation would be a nice set of swivel head ratchet wrenches and a 3/8” drive u-joint.

• This is not a one-size fits all answer – it comes down to how much power the vehicle is making (or will be making once all mods are complete), if the vehicle is naturally aspirated or has some kind of power adder(s), how the vehicle is being driven, and average RPM range, amongst others.
• Generally speaking, bigger is NOT ALWAYS better. You want to use the smallest primary tube that your engine/power output will allow to maximize both torque and top end horsepower.
• If you have additional questions, contact Kooks at 704-768-2288 or email sales@kooksheaders.com

• Power results will vary based on several factors, including but not limited to other modifications on the vehicle, air temperature or humidity, altitude, engine quality, and of course, the all-important tune.
• Generally speaking, customers will see between 10-25 more horsepower and 15-30 more ft. lbs. of torque with our Super Street or Torque Series headers, which offer a no-tune solution for making more power. With our long-tube systems and a proper tune, customers will generally see about 25-50 more horsepower and 30+ ft. lbs. of torque.

• Kooks products are proudly hand-crafted in the US with locally sourced 16 gauge 304 stainless steel material and comes with a limited lifetime warranty.
• Kooks has been paving the way in header and exhaust manufacturing since 1962 – our expertise guarantees the best quality, sounds, and performance on the market.
• After over 60 years of perfecting our design and engineering skills, Kooks promises the best fitment on the market. Installation of Kooks products should be drama free, saving you time, extra shop fees, and frustration.
• Kooks also boasts the highest level of customer service – if you have any questions or concerns, their sales team and technicians are available for support and will respond same-day during normal business hours.

• Our full variety of products can be found online at www.kooksheaders.com
• Kooks also has a variety of authorized dealers that can be found here: https://kooksheaders.com/dealer-locator
• Your preferred install/tuning shop may also be able to order through select nation-wide WD suppliers

While Kooks offer a wide variety product options, unfortunately we cannot stock all makes/models for a variety of reasons including but not limited to low demand, preexisting  known fitment issues or the make/model is discontinued. Kooks does offer custom builds if the schedule allows. Please fill out the Vehicle Not Listed form to submit to our R&D team so we can get in touch with you.