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The aFe Apollo GT Cat‑Back Exhaust for GM trucks (2009–2018; 4.3L/4.8L/5.3L) is a 3" mandrel‑bent 409 stainless system engineered for stronger flow and an aggressive tone. Dyno results show up to +14 HP and +17 lb‑ft torque. It uses factory‑style hangers for direct bolt‑on fit and is finished with dual 4.5" polished 304 stainless clamp‑on tips and full MIG welds for lasting durability.
aFe Apollo GT Cat-Back Exhaust GM Trucks 09-18 V6-4.3L/V8-4.8/5.3L-Dual Rear-Side Exit Polish Tips
