G9011.mp4 Apr 2026

Use high-quality gaskets. While standard gaskets are included, some users recommend Remflex gaskets for better leak prevention.

3.00 inches with 2.500-inch reducers included.

Primarily fits 1968–1990 GM Truck 4x4 big-block applications. They are not officially intended for GMT400 trucks, as some users report clearance issues with 4WD systems. Installation Walkthrough & Technical Notes g9011.mp4

According to the official Installation Instructions , the process generally requires the following steps:

18-gauge steel with a temporary non-high temperature paint coating. Use high-quality gaskets

. If you are looking for an installation guide or technical overview related to this part number, here is the technical breakdown: Product Overview: Summit Racing SUM-G9011 Headers Go to product viewer dialog for this item.

You may need to cut roughly 5/16” off the stock spark plug heat shields to ensure a proper fit. g9011.mp4

Disconnect the battery and remove existing manifolds. Some applications may require dropping the starter to slide the passenger-side header into place. Fitting: Work headers up from below the chassis.