Gibson Performance Headers are the perfect solution for your vehicle! Gibson Headers are all Dyno tuned and engineered to deliver more usable horsepower and torque at low and mid-range RPM highway speeds, where you use it most! Gibson Headers Improve your engine's ability to breathe by eliminating the restrictive design of your OEM exhaust manifolds, getting the exhaust out faster. This results in improved horsepower and torque. Designed as a direct replacement for your factory manifold(s), connecting to your stock crossover pipe, Gibson Headers are easier to install.
Gibson Header Features:
Will not affect the factory warranty
. No welding required.
Uses OEM style connections.
Heavy Duty Laser Cut Port Flanges- No Warping or Leaking.
Premium Gaskets and Hardware included.
Backed by a Lifetime Limited Warranty.
The part number for this item is GP115S and it fits 1999-2001 Chevy Silverado, GMC Sierra (4.8 and 5.3 Models w/ EGR w/out Air Injection) models.
Features 1-5\8-inch mandrel-bent 16-gauge stainless steel mandrel bent tubing.
3/8" thick laser cut port flanges- no warping or leaking
50 State Legal
Gibson Headers Include all required gaskets and hardware, Instructions, and a limited lifetime guarantee