Flowmaster Flow FX Muffler 2007-gmc-sierra-2500-hd-esi3454831 Crate Engine - LS3 -

Crate Engine - LS3 - 430 HP - GM LS-Series - Each

570 in Head - 0

625 in Bolt Circle - Steel - Purple Paint - GM - Each

Leaf Spring Block - Adjustable - 2

Body Reinforcing Plate - Large 1-3/4 in Diameter - Aluminum - Natural - Quick Release Fastener - Set of 10

Flowmaster Flow FX Muffler 2007-gmc-sierra-2500-hd-esi3454831 Crate Engine - LS3 -Flowmaster's Flow FX series mufflers deliver a moderate performance tone for the enthusiast looking for an exhaust note that is different from the "chambered" muffler sound. The interior features a large "straight through" stainless steel perforated core, surrounded with high temperature sound absorption materials delivering a deep mellow tone. The internal flow design is reversible, so the muffler can be installed in either direction to best suit the