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Make more of your LS2 GTO
Upgrade your 6.0-litre GTO with Kooks 1-7/8" stainless long tube headers and a matched Performance-catted front connection set. This package joins the 3" OEM rear interface on the 2005-2006 LS2 car.
SKU: 2412H420
A 3-inch rear connection for the LS2
The headers use 3" collectors and the supplied front pipes retain 3" OEM rear outlets. That is the key connection difference from the 2004 LS1 package, which uses 2-1/2" outlets.
Installation requires removal of the original driver-side heat shield. The passenger-side shield does not need to be removed.
Headers and front cats bought together
The combined package gives you the headers and their matching catted connections for a naturally aspirated LS2. Keep a rear exhaust using the factory interface, or pair it with a compatible rear system when planning a larger exhaust change.
Tuning for your exhaust upgrade
We recommend tuning with every header installation so the calibration suits your new headers, complete exhaust and fuel. Contact us to discuss the right tuning route for your vehicle.
Matching products
Complete the rear of your LS2 exhaust with the 2005-2006 GTO 3-inch cat-back if you want the rear system and polished tips as well.
Vehicle fitment
| Years | Vehicle / trim | Engine | Applicable SKU | Fitting conditions |
|---|---|---|---|---|
| 2005-2006 | Pontiac GTO Base | 6.0L V8 | 2412H420 |
Intended use
Competition, off-road and track use only. Not for use on public roads.
Ordering and delivery
Estimated lead time is 4-6 weeks. Delivery may be faster depending on stock levels. Shipping is charged separately.
Technical specifications
| Specification | Details |
|---|---|
| SKU | 2412H420 |
| Application | 2005-2006 Pontiac GTO LS2 6.0L |
| Material | 304 stainless steel |
| Headers | 1-7/8" primaries; 3" collectors |
| Connections | Performance-catted |
| Rear outlet | 3" OEM |
| Catalyst condition | Naturally aspirated only |
| Fitting change | Original driver-side heat shield removed |
Frequently asked questions
Does this use the 2004 GTO rear outlet size?
The LS2 kit has 3" OEM outlets. The 2004 LS1 kit has 2-1/2" outlets.
Can I use the supplied cats with a supercharger?
Performance cats are specified for naturally aspirated engines. Choose a forced-induction catalyst arrangement for a supercharged build.
