The QP2000 cast iron Quiet Performer header for Big Block Chevy engines overcomes limitations of tube type headers in both fit and in its ability to produce gains in both low end torque and high end horsepower. The QP2000 provides excellent steering clearance even for 1955-57 Chevy cars using the Saginaw 605.
Our Cast Series header incorporates individual runners to separate exhaust pulses, with cast anti-reversion baffling to prevent spent gasses from being drawn back into the cylinder during valve timing overlap, when both intake and exhaust valves are open. Scavenging of the cylinders is significantly improved by our D-Shaped technology, first used by GM on their High Output cylinder heads. The result is exhaust headers that create more torque and power at every RPM range.
There are other benefits to the Cast Series header. Because they are more compact than tubular headers, they provide more clearance for stock, manual, 605 or rack and pinion steering setups, accessories and other chassis and engine components.
Please Note: This header is a D port design.
Comes with all hardware necessary for installation.
Features and Specifications:
- Engine: Chevy 396-454
- Finish: Plain Steel
- Primary Tube Diameter: 1-7/8"
- Collector Diameter: 3"
- Tube Thickness: 16 Gauge
- Flange Thickness: 3/8"
- Header Gasket: Not needed
- Header Bolt Set: Included
- Collector Reducer: Included
- Made in the USA
Vehicle Applications:
- 1930-48 Cars and Trucks
- 1955-57 Chevy Cars with Auto Trans
- 1958-64 Chevy Full Size Cars
- 1965-67 Chevy Full Size Cars
- 1948-52 Ford Pickup
- 1953-66 Ford Pickup
- 1949-54 Chevy and GMC Trucks
- 1955-82 Chevy Corvette - May Require Cutting Excess A-Arm shaft Threads
