100% Satisfaction Guarantee Since 1978
We stand behind our solutions and customers.
The ATK SP67 Chevy LS3 415 Short Block is designed for building high compression engines. Featuring aluminum engine block, this short block includes forged 4340 steel crankshaft, forged aluminum piston, and forged 4340 steel connecting rod for exceptional sturdiness and endurance.
Every great build needs a solid foundation! For that reason, we take the hard work out of the picture by selling short blocks that are ready for you to complete yourself. Our GM Short Blocks are most commonly packaged as the engine block assembled with Pistons, Piston Rings and Crankshaft installed.
ATK specializes in muscle. With the highest quality internal parts and Dyno Proven combinations of every engine built, ATK is able to add the most bang for your buck and back it up with an industry leading warranty.
Don't forget the engine paint!
To get $10 OFF your order!