Beyea Custom Headers IDM602-NSM-B2 Northern Sport Modified Headers 602 Crate SBC 1-5/8" Primary

The Beyea Custom Headers IDM602-NSM-B2 is a precision-engineered header system designed specifically for IMCA-UMP Northern Sport Modified race cars equipped with GM 602 crate engines. These 4-1 collector style headers feature 1.625-inch primary tubes that transition into a 9-inch long collector with a 2.75-inch diameter, optimized to produce strong top-end power for competitive circle track racing.

Key Features:

• Designed for Small Block Chevy 602 crate motors in Northern Sport Modified applications
• 1-5/8 inch (1.625") primary tube diameter for optimal exhaust flow
• 9-inch long collector with 2.75-inch diameter
• Laser-cut 5/16-inch thick flanges ensure solid mounting and superior sealing
• Steel construction with black paint (temporary coating that burns off during use)
• 4-1 collector style tuned for broader power curve and increased top-end performance
• IMCA and UMP sanctioning body accepted
• Sold as a pair (left and right side)

Beyea Custom Headers brings over 15 years of header fabrication expertise to the circle track racing community. Each header design has been extensively tested and proven by top Modified and Late Model race teams and engine builders across the United States. Compatible with various Modified chassis including Bandit, Assault, Kazz, Lethal, 2009 and older Lightning, Longhorn, MB Custom, 2017 Shaw, and TRC chassis. High-temperature paint or coating recommended for long-term durability.