Description:

Is your project ready for its new LS? We have a couple of 408ci, hydraulic-roller long blocks available for sale as-shown or get one fully-finished and turn-key optioned out the way you want.  Our standard build 408 puts out 720 hp naturally aspirated.  No supercharger or crazy cam needed. We get these results from our precision CNC machining, parts selection and tune. If you watch the videos in our YouTube Machining Playlist, you'll better understand how we put up such big numbers on this engine.

The short block starts with a seasoned GM 6.0L block that we have digitally remastered to better than new condition. The Callies 8-counterweight stroker crank gives us additional displacement, reduced harmonics and increased stiffness for longer life. The rotating assembly is completed with forged Callies Compstar Extreme rods and Diamond R Series pistons.

We are exclusive with COMP Cams who makes all our custom grinds.  The valve train is stabilized with a COMP trunnion set.  That brings us to the cylinder heads. These AFR Mongoose LS3 heads have a 12-degree valve angle for improved performance.  They also have a 6-bolt design which we retain although not required for a stock block.  We buy the heads as porter castings for CNC porting on our 5-axis (see video below). 

This long block can be completed to your requirements or purchased as-shown. Please call us at 815-725-2727 to discuss how we can best put together your dream engine.

Built by people who love motorsports for people who love motorsports

NOTES
1 These engines are not pollution compliant and are intended for transportation use only in pre-pollution controlled vehicles.
2 All BRE engines are individually dyno tested and tuned. Atmospheric and other variations can cause results to vary +/- 2% from advertised ratings. Customers will be supplied with video of their engine's dyno along with the dyno and build sheets.
3 Please read the warranty policy posted on our website: https://borowskirace.com/pages/warranty

Payments by: ACH Money Order, wire transfer, bank check