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31 in Rectangular Port - Composite - GM W-Series - Kit
Main Bearing - Race Series - Standard - Extra Oil Clearance - Narrowed - Big Block Chevy - Kit
The system is finished off with dual 2
5 in ID - 8 in Length - 500 lb/in Spring Rate - Steel - Black Powder Coat - Each
Carburetor Inlet Fitting - Straight - 9/16-24 in Male to 3/8 in Hose Barb - Brass - Natural - Holley 4160 Carburetors - Each
Flowmaster - Flowmaster Flow FX Cat-Back Exhaust System 31 in Rectangular Port -Our new Flow FX cat back exhaust system for 2009 2013 GM Silverado Sierra 1500 with 5. 3L engines is manufactured using durable 409 stainless steel throughout and features a 3. 00 inch inlet pipe leading to a single inlet dual outlet Flow FX "straight through" muffler for great sound and maximum performance. The dual 2. 50 inch mandrel bent tailpipes exit out the side at an angle behind the rear wheels directing exhaust away from your boat or travel