Shop Hedman Headers Header and exhaust in Canada & USA, Marken Performance 1-888-401-1362
Hedman’s full-length headers are engineered to deliver maximum exhaust flow while maintaining the factory catalytic converter locations and A.I.R. injection, making them 50-State emissions legal under C.A.R.B. EO#D-167-33 for vehicles equipped with 305cid, 307cid and 350cid V8 engines. Even with their state inspection-friendly status, these headers deliver performance that is far from stock, helping unlock the true potential of your G-body’s small block engine. Call Marken Performance to see if one fits your car. Hedman builds these headers with 1 ½-inch primaries and a 3-inch ball-style collector, and are available in either Hedman’s Standard Duty or Ultra-Duty ELITE construction. Standard Duty headers are built using 18-gauge mild steel primaries, while the Ultra-Duty ELITE headers feature bullet-proof 3/8-inch flanges and thick-wall 14-gauge primaries. Each set comes complete with header gaskets, bolts and header reducers that easily weld to the car’s exhaust system for a durable, gasket-free connection between the headers and the rest of the exhaust system.
Standard Duty headers for ’78-’87 GM G-Body vehicles are available either in an uncoated finish (#68311) or with Hedman’s HTC polished ceramic-metallic coating for protection up to 1,400-degrees Fahrenheit (#66311). The Ultra-Duty ELITE Series headers are coated with a matte finish version of Hedman’s HTC hi-temp coating (#61318). Mounting hardware, instructions, and the mandatory E.O. sticker for your engine compartment are also included. For those looking for more power from their emissions-exempt vehicles, Hedman also offers these headers without A.I.R. injection (#68310, #68316 and #68318). If ground clearance is an issue, Hedman offers mid-length and “shorty” style headers for applications where maximum ground clearance is required.
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