Description:

This short block is the foundation of our 800 horsepower, naturally-aspirated, pump gas build. This beast can drive to the track and tear it up when it gets there without breaking a sweat as you'll see in the video below. 

The foundation is an RHS aluminum block.  An aluminum block compared to its iron counterpart transfers heat better and weighs 100 lbs. less.  While weight reduction is helpful to drag racers, it's huge in road race and autocross for its effect on vehicle turning and braking. This block also brings a six-bolt head bolt design and the strength to easily handle this power level. In our experience, OE aluminum blocks don't hold up well in this power range.  This one will! Every RHS block is CAT scanned to assure that you'll receive a perfect casting. 

We finish-machine the blocks to perfection on our 4-axis CNC mill and CNC diamond hone. This last machining step is critical as it sets the cylinder bores' final dimensions and surface finish.  Old-school manual hones can come anywhere close to the precision and quality of our machining as you can see in the video down below.

The rotating assembly starts with a Callies Compstar center counterweighted crank. The extra counterweights increase stiffness by 25% and reduce harmonics.  This in turn enhances longevity and virtually eliminates uneven bearing wear.  The forged Callies Ultra H-beam rods and Diamond Race Series pistons complete a short block that you won't need to worry about.  The pistons will accommodate either LS3 or LS7 design heads. Check out the second below to learn more about why we like center counter-weighted cranks so much.

Give us a call at 815-725-2727 to get this great short block coming your way!

BUILT BY PEOPLE WHO LOVE MOTORSPORTS FOR PEOPLE WHO LOVE MOTORSPORTS.

 Accepted methods of payment: Cash, certified check, money order, wire transfer