The TwisterBBC outside chassis header for the big block Chevrolet 396-502 engine applications offers a unique roadster header design while including important features to make installation easy and trouble-free. Mufflered slip-in exhaust collectors (baffle inserts) are integrated into the header design, and finish-matching turnouts are included. No need for an under-chassis exhaust system!
Includes all hardware necessary for installation.
Images provided may include various engine applications
Engine: Big Block Chevy 395-454, 502
Primary Tube Diameter: 1-7/8
Collector Diameter: 3½”
- 16-Gauge Primary and Collector Tube Thickness
- 3/8″ Thick Flange
- Patented Flange Design Requires NO Gaskets
- Tightest Fitting Header Available Anywhere!
- Made in the USA
- Header Bolt Set
- Baffle Inserts
- Turnout Tips
Our Ceramic Coating is recommended for every vehicle application and is the default finish selection choice above. To meet high standards of quality, We apply a multi-layer inside and outside aluminized ceramic coating in-house and then polish the coating to a high luster. This aerospace and military-grade technology adds excellent protection to your headers while offering the benefit of thermal control in your engine bay. It also improves cylinder scavenging of exhaust gases and increases the longevity of your header investment.