Hooker's RacingHeart Big Block Chevy Downswept, 3-Step Dragster Headers feature 2.125 inch/2.25 inch/2.375 inch stepped primary tubes to maximize exhaust flow, resulting in horsepower and torque gains over a broad rpm range. The 4.5 inch merge collector with merge spear design improves the transition of the exhaust pulse from the primary tube to the collector and maximizes the scavenging effect on the exhaust pulse. This helps maintain the velocity of the pulses as they travel through the collector. These headers are ideal for big block Chevy engines making over 1000 horsepower. They are available in both Chrome plated Mild Steel and Polished 304 Stainless Steel.
Features:
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
- Header Style:
- Dragster Downsweep
- Header Material:
- Steel
- Header Finish:
- Titanium ceramic coated
- Weld-Up:
- No
- Primary Tube Outside Diameter (in.):
- 2.125, 2.250, 2.375 in.
- Flange Style:
- Standard
- Flange Thickness (in.):
- 0.375 in.
- Collector Attachment:
- Slip fit
- Collector Diameter (in.):
- 4.500 in.
- Collector Reducers Included:
- No
- Collector Reducer Exit Diameter:
- N/A
- Tuned:
- No
- Primary Tube Length (in.):
- 30 in.
- Cylinder Head Port Shape:
- Round
- Primary Tube Gauge:
- N/A
- Gaskets Included:
- Yes
- Hardware Included:
- Yes
- Crossover Pipe Included:
- No
- Crossover Pipe Style:
- N/A
- Crossover Pipe Diameter:
- N/A
- Spark Plug Position:
- N/A
- Catalytic Converter(s) Included:
- No
- Oxygen Sensor Bung:
- No
- Quantity:
- Sold as a pair.
- Make:
- Chevrolet
- Engine Family:
- Chevy big block Gen V
- Years:
- 1991-1995
- Engine Family:
- Chevy big block Gen VI
- Engine Sizes:
- 7.4L/454
- Years:
- 1996-2000
- Engine Family:
- Chevy big block Mark IV
- Engine Sizes:
- 6.5L/396-7.4L/454
- Years:
- 1966-1990
- Transmission:
- N/A
- CARB EO Number(s):
- No
- Emissions:
- No
