Kooks GM 1500 4.8 / 5.3 Header Kit, 1-7/8-inch (1999-2006) | 2851H420

Make your GM V8 part of the enjoyment

Upgrade the front exhaust on your supported GM 1500 truck or SUV with Kooks 1-7/8" long tube headers and a Performance-catted Y-pipe. The kit covers the listed 4.8- and 5.3-litre applications and joins the OEM rear exhaust, letting a compatible cat-back stay in place.

SKU: 2851H420

A matched package for your truck

The 304 stainless headers have 3" collectors feeding the supplied 3" Y-pipe. Choosing the headers and front connections together gives you a coordinated conversion from the cylinder heads to the retained rear exhaust.

Choose around your engine and year

This is the 1-7/8" package for the listed 1999-2006 applications. A separate 1-3/4" kit is also available. Choose the primary around your engine modifications; the larger size alone is not a promise of a better result on every engine. Performance cats are for naturally aspirated use.

Fitting your exhaust

Some installations with 90-degree spark-plug boots need the wires modified as shown in the fitting guide, or replaced with suitable aftermarket wires.

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.

Vehicle fitment

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.