Outfront Motorsports V4 Racer Shortblock Plug and Play ECU Gear-based Mapping: set a different

Gear-based Mapping: set a different boost for each gear

With a unique baffling system

As soon as the rocker finds a camshaft lobe there is a seriously high chance (note

These heads are a great option for your basic bolt on engines up to 575 BHP

most flexible

Outfront Motorsports V4 Racer Shortblock Plug and Play ECU Gear-based Mapping: set a differentThis closed deck block design has been proven to withstand extreme boost levels resulting in high cylinder pressures without the worry of cracking a sleeve. The billet material that reinforces the combustion area has been further optimized with our V4 closed deck block in the known problem areas making it a far superior product to any sleeved block. With a closed deck block the stock sleeves are still in place eliminating all risk of dropping sleeves