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MagnaFlow Street Series cat‑back exhaust for 2008–2010 Hummer H3 5.3L delivers a resonant, powerful tone and proven flow improvements. The system uses mandrel‑bent 2.5in main piping, two straight‑through mufflers and a dual‑split rear exit with 3.5in polished welded‑on double‑wall tips. It’s a direct‑fit cat‑back built with CNC precision and backed by a 1‑year finish and limited lifetime construction warranty.
MagnaFlow Sys C/B 08 Hummer H3 5.3L V8
