40 Series - 2.25 Offset In / 2.25 Center Out - Aggressive Sound 1977-gmc-c15-esi6377310 The accessory drive components in

The accessory drive components in this system can be configured in several different ways

Differential Cover - Reinforced - Main Cap Bolts / Magnetic Drain Plug Included - Aluminum - Gray Crinkle Powder Coat - GM 12-Bolt - Each

Brake Caliper Bracket - Rear - Driver / Passenger Side - Floater - 3 in OD Axle Tube - Steel - Black Powder Coat - GM Metric Caliper - Kit

Gauge Kit - VHX Series - Analog - Fuel / Oil Pressure / Speedometer / Tachometer / Voltmeter / Water Temperature - Black Face - Chevy Fullsize Car 1955-56 - Kit

40 Series - 2.25 Offset In / 2.25 Center Out - Aggressive Sound 1977-gmc-c15-esi6377310 The accessory drive components inThe Original 40 series muffler delivers an aggressive exterior and interior tone. If you're looking for that original Flowmaster sound this is the muffler is for you. Constructed of 16 gauge aluminized steel and fully MIG welded for maximum durability.