American Racing: 1984-1991 C4 Corvette Long System Headers, 1-3/4” or stepped 1-3/4” X 1-7/8” 11mm Average gains on an otherwise

Average gains on an otherwise stock motor are 5hp N/A and 12 to 15 with factory forced induction

Allows 360 degree rotation of banjo fitting for correct alignment and strain reduction

Recommended change is annually

Mounts under the hatch floor for a stealth look and you don't lose any trunk space

Unisex Sizing

American Racing: 1984-1991 C4 Corvette Long System Headers, 1-3/4” or stepped 1-3/4” X 1-7/8” 11mm Average gains on an otherwiseFor C4 Corvette owners, American Racing Headers has answered the call. C4 systems are currently available with features youd expect from ARH, including your choice of 1 3 4 or stepped 1 3 4 X 1 7 8 primaries and our 3 or 2 1 2" X Pipe equipped exhaust (with or without our 200 cell metallic substrate cats). It simply doesnt get better. Will work with straight or angle plug heads. Expect minimum gains of 25 RWHP. Convertibles require our 2 1 2" X Pipe