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The MagnaFlow Cat‑Back Exhaust for 2005–2008 Pontiac Grand Prix (5.3L) replaces stock components from the catalytic converter back to deliver a resonant, powerful tone and dyno‑proven results. It features mandrel‑bent 2.5" piping, three straight‑through mufflers and a quad split rear exit with 4" polished double‑wall tips. Engineered for direct fit with 3D scan development and CNC production; includes MagnaFlow finish and construction warranty coverage.
MagnaFlow Sys C/B 05 Grand Prix GXP 5.3L V8
