Mercury Racing SB4 DOHC

Mercury Racing has partnered with Roadster Shop to bring the revolutionary SB4 DOHC engine to the custom car market. Based on the GM LS7 engine block, Mercury has developed a dual over head cam, 4 valve head to take the LS platform to the next level. The 4 valve head allows for significantly improved intake and exhaust port flow over the traditional 2 valve design, resulting in improved drivability, idle quality, and most importantly a package that revs to 8,000 RPM making 750 HP.