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1347 Review
61 Karma

Review on πŸ”© Gibson GP500S Performance Header in Stainless Steel by Cornelius Mosley

Revainrating 5 out of 5

Good Manifolds!: Exhaust and Emissions

Got them for my 05 2500hd 6.0. The fit is excellent, the ignition cables do not rub. Many people say no change in sound or performance, I've gotten a little louder but a very noticeable increase in performance, now it really pulls uphill without downshifting.

Pros
  • Manifolds and Parts
Cons
  • Weak