MagnaFlow Street Series Stainless Cat-Back Performance Exhaust System | Hummer H2 (03-06) (16673)The MagnaFlow 2003 2006 Hummer H2 Street Series Cat Back Performance Exhaust System brings out the personality of your 6. 0L 2003 2006 Hummer H2 with our signature resonant, powerful engine tone and dyno proven performance. Thanks to its fast flowing, mandrel bent 3in. main piping and 1 Straight Through mufflers ending in a Dual Split Rear exit with 4in. Polished Welded On Double Wall Angle Cut Rolled Edge tips, this Hummer H2 exhaust kit has the