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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 LS Based Short Blocks are most commonly packaged as the engine block assembled with Crankshaft, Connecting Rods, Pistons, Rings and Bearings.


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Chevy LQ4 6.0L Short Block
ATK SP19 Chevy LQ4 6.0L Short Block OE Dish Pistons
Our Price (USD): $2,471.00

Great foundation for mild street build, or just replacement for a tired short block. more info
Chevy LQ9 6.0L Short Block
ATK SP19-F Chevy LQ9 6.0L Short Block OE Flat Top Pistons
Our Price (USD): $2,471.00

Great foundation for mild street build, or just replacement for a tired short block. more info
Chevy LM7 5.7/347 Short Block 24 Tooth Reluctor Wheel
ATK SP75 LM7 5.3/5.7 Short Block -3.2cc Flat Top Pistons 24 Tooth
Our Price (USD): $2,900.00

This short block is built for Naturally Aspirated engines up to 700HP more info
Chevy LM7 5.7/347 Short Block 24 Tooth Reluctor Wheel
ATK SP76 LM7 5.3/5.7 Short Block -11cc Dished Pistons 24 Tooth
Our Price (USD): $2,941.00

This short block is built for Naturally Aspirated engines up to 700HP more info
Chevy LM7 383CI Short Block 24 Tooth Reluctor Wheel
ATK SP77 LM7 383CI Short Block -8cc Dished Pistons 24 Tooth
Our Price (USD): $3,684.00

This short block is built for Naturally Aspirated engines up to 700HP more info
Chevy LM7 383CI Short Block 24 Tooth Reluctor Wheel
ATK SP78 LM7 383CI Short Block -15cc Dished Pistons 24 Tooth
Our Price (USD): $3,684.00

This short block is built for Naturally Aspirated engines up to 700HP more info
Chevy LM7 383CI Short Block 24 Tooth Reluctor Wheel
ATK SP79 LM7 383CI Short Block -32cc Dished Pistons 24 Tooth
Our Price (USD): $3,684.00

This short block is built for Naturally Aspirated engines up to 700HP more info
Chevy LM7 383CI Short Block 24 Tooth Reluctor Wheel
ATK SP80 LM7 383CI Short Block -3cc Flat Top Pistons 24 Tooth
Our Price (USD): $3,684.00

This short block is built for Naturally Aspirated engines up to 700HP more info
Chevy LS 408 Stroker Short Block 58 Tooth Reluctor Wheel
ATK SP26 LS 408CI Stroker Short Block +10cc Dish Pistons 58 Tooth
Our Price (USD): $4,007.00

This short block is built for all motor builds with higher compression but with the option of running pump gas it will hold up to 700HP. more info
Chevy LS 408 Stroker Short Block 24 Tooth Reluctor Wheel
ATK SP31 LS 408CI Stroker Short Block -18cc Dish Pistons 58 Tooth
Our Price (USD): $4,007.00

This short block is built with a mild compression ratio great for easy tuning on pump gas or running a small shot of nitrous. If used with nitrous there will be no warranty as there is more room for error with nitrous systems and tuning. more info