Riser, GM Big & Small Block V8

Riser. For: Crusader GM Small Block V8 305-350cu.in (Models CM305, CM350XL, and CM350HT). For: Crusader GM Big Block V8 454cu.in (Models 454XL and 502XL). 6-3/4" High. 10 degree down angle. 4" exhaust outlet. Meets or exceeds manufacturer's recommended specifications. Backed by Sierra's limited lifetime warranty. For: Crusader GM Small Block V8 305-350cu.in (Models CM305, CM350XL, and CM350HT) For: Crusader GM Big Block V8 454cu.in (Models 454XL and 502XL) 6-3/4" High. 10 degree down angle. 4" exhaust outlet Meets or exceeds manufacturer's recommended specifications Backed by Sierra's limited lifetime warranty