Item: Proflow Exhaust Headers Stainless Steel Extractors Commodore VN VP VR VS 5.0L V8 Dual Cats 1-5/8in. Primary Set. Give your car that deep, throaty note that only stainless steel headers give. All headers are welded in a jig to ensure no warping occurs and each flange is laser cut from 10 mm plate for high accuracy.