Hooker Headers 2502-2HKR RacingHeart Dragster Exhaust Header Set Big Block Chevy

2.125 in./2.25 in./2.375 in. Stepped Primary Tubes Maximize Exhaust Flow, Resulting in Horsepower and Torque Gains Over a Broad RPM Range 4.5 in. Merge Collectors Improve the Transition from the Primary Tubes to the Collector, Helping to Increase Exhaust Pulse Velocity Collectors Feature Merge Spears for Increased Exhaust Velocity and Scavenging 3/8 in. Thick Header Flanges for Strength and Maximum Sealing Surface Available in both Chrome Plated Mild Steel and Polished 304 Stainless Steel Offers a Better Combination of Low End Torque and High End Horsepower Compared to a Non Stepped Header