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The Gibson single cat‑back exhaust for 1988–1993 GMC C3500 Sierra 5.7L improves low‑end torque and horsepower with a quiet cabin and strong low‑RPM response. Dyno results show maximum gains in the 1800–3000 RPM range, with typical horsepower increases of 10–15 and torque gains of 15–20 lb‑ft. The bolt‑on system includes hangers and hardware and is backed by a lifetime limited warranty.
Gibson 88-93 GMC C3500 Sierra 5.7L 3in Cat-Back Single Exhaust - Stainless
