Beyea Custom Headers IDM602-NSM-G Small Block Chevy 602 Crate Northern Sport Modified Headers 1-5/8 Inch

Beyea Custom Headers IDM602-NSM-G are engineered specifically for IMCA-UMP Northern Sport Modified dirt track racing with GM 602 crate engines. These professional-grade headers feature a 4-into-1 collector design optimized to maximize power output from the restrictive 602 crate motor platform.

Key Specifications:

• Primary tube diameter: 1-5/8 inch (1.625 inch) straight tubing
• Collector size: 2-3/4 inch diameter x 9 inches long
• Includes 10-inch long turndowns for track compliance
• Constructed from mild steel with black painted finish
• Laser-cut flanges ensure proper seal and fitment
• Sold as a pair (left and right side)

Chassis Compatibility - Style G: This specific variant (Style G) is designed to fit GRT chassis and similar Northern Sport Modified chassis including Arrow, BMS, Elite, Flexi Flyer, Hoffman, Quick, SSR, TDR, and TRC. Each Beyea header design is chassis-specific, so verify your chassis type before ordering.

With over 15 years of header fabrication experience, Beyea Custom Headers specializes in circle track racing exhaust systems. Each header design has been extensively tested and proven by top Modified and Late Model race teams across the United States. The straight 1-5/8 inch primary tubes are specifically tuned to create an optimized power curve for the 602 crate engine, delivering a broader powerband where you need it most on dirt tracks.

Note: This product is designed and intended exclusively for off-road racing use in sanctioned competition events. Not legal for street use or emissions-controlled vehicles.