News feed Profile Menu

Roadster Shop and Mercury Racing partner up to bring the revolutionary SB4 DOHC Engine

Industry News   |   Posted: 04/12/2018
Posted by: Roadster Shop


750 Horsepower DOHC Engine based on the LS7 Engine Block

Mundelein, IL, April 12, 2018– Mercury 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 engine block, Mercury has developed a dual overhead 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 8000 RPM making 750 HP.

Horsepower: 750@ 8000 RPM, Displacement: (L/Cid): 7.0 /428, Bore (MM/IN: 104.775 / 4.125,

Stroke: (MM/IN): 101.60 / 4.00, Compression Ratio: 11.7:1, Cylinder Arrangement: V8,

Alternator (Amp/Watt): 165/2327, Controller: Mercury PCM, Fuel System: Sequential EFI,

Warranty: 12 Month Limited.

If you would like more information about this topic, contact Brian Downard at 847.949.RODS (7637) or visit our web site at:

Roadster Shop
28775 N Il Route 83
Mundelein, IL, 60060
(847) 949-7637
Email Us
View Company Profile