Swift Rear Coil Spring - Bulletproof - 5.0" OD x 13" Tall - 175 lb. 36006BL 600 exhaust valves this head

600 exhaust valves this head moves tremendous volumes of air through conservative runner volumes

and they've been manufacturing headers for Chevy passenger cars for decades

1967-1968 GMC C25/C2500 Suburban

ECU Power Harness

Swift Rear Coil Spring - Bulletproof - 5.0" OD x 13" Tall - 175 lb. 36006BL 600 exhaust valves this headPURPOSE BUILT FOR THOSE OF YOU PUTTING MORE STRESS ON A SPRING THAN HOW IS CONVENTIONALLY USED. WE SOUGHT AFTER A NEW APPROACH IN DEVELOPMENT FROM OUR REGULAR SUSPENSION SPRING. Swift Springs manufactures springs with differing rates for a variety of circle track racing applications. With options for both dirt and asphalt tracks, Swift has a wide range of coil spring formats, including coil over, dual rate, bump springs, and more. Swift Springs