Stainless Steel Exhaust Header 66-87 Chevy/GMC Small Block Chevy SBC Pickup Truck SUV Jimmy/Blazer Fit: 1966-1987 Chevy Small Block 265-350Ci, Pickup Truck/Blazer/Jimmy 2/4WD (Exclude Big Block/Big Block Motor Mounts) Tube Diameter: 1 1/2" Collector Size: 3.00" Flanged Connection. TIG Weld & Polished Stainless Steel Mandrel-Bent For Maximum Performance