American Thunder Exhaust Chev/GMC C10/15/20/25 #17742 HED28140 16mm (1-1/16 - 1-3/16")

16mm (1-1/16 - 1-3/16")

50 Center Out - Aggressive Sound

Morse taper 3

Overall Length: 281mm

American Thunder Exhaust Chev/GMC C10/15/20/25 #17742 HED28140 16mm (1-1/16 - 1-3/16")Part # 17742 Description Header back American Thunder Kit DOR S Mod Agg Sound Application Summary 1973 to 1987 Chevrolet and GMC C10 (1 2 ton) and C20 (3 4 ton) Pickup Trucks, 2 Wheel Drive Only. Not emissions compliant on vehicles originally equipped with a catalyst system. Note 1: Not Legal For Use On Vehicles Originally Equipped With Catalytic Converter Features Flowmaster's American Thunder Crossmember back exhaust system for the 73 87 GM C10 C20,