750hp CammerMercury Racing has partnered with Roadster Shop to bring the revolutionary SB4 DOHC engine to the custom car market, available exclusively through the Roadster Shop. Based on the GM LS7 ...

Mercury Racing / Roadster Shop SB4 7.0 - DOHC 32 Valve engine based on LS7 makes 750 hp at 8,000 rpm! A look at the new SB$ DOHC LS-based engine designed by Mercury Racing and brought to the ...