Beyea Dirt Late Model Tri-Y Headers - SB Chevy 360-420 cu. in. w/ 18 Degree BRODIX Spread Port Heads - Tube Diameter: 1-3/4" x 1-7/8" x 2" - Collector Diameter: 3-1/2" 7 1977-1978 GMC C35

1977-1978 GMC C35

1984-1985 Pontiac J2000 Sunbird

1979-1986 GMC C2500 Suburban

Bullitt / Cobra / Mach1

Beyea Dirt Late Model Tri-Y Headers - SB Chevy 360-420 cu. in. w/ 18 Degree BRODIX Spread Port Heads - Tube Diameter: 1-3/4" x 1-7/8" x 2" - Collector Diameter: 3-1/2" 7 1977-1978 GMC C35Product Description: Headers Dirt Late Model Tri Y 1. 75 to 1. 875 to 2 in Primary 3. 5 in Collector Steel Black Paint 18 Degree Head Small Block Chevy With more than 15 years in the header fabrication business, Beyea Custom Headers knows how to customize your power curve to create a broader range of power. Each Beyea Custom Headers has been tried and tested. Beyea Custom Headers are used by many of the top Modified and Late Model race teams and