Our Hotrod series engines are the perfect choice for someone building a custom hotrod, old muscle car, or replacing that tired old factory engine in your late model GM vehicle.


We have used our Hotrod LS3 shortblock in 500whp NA setups or in boosted setups up to the 700whp mark.


HotRod Series LS3 Shortblock 


Bore: 4.065"

Stroke: 3.622"

Connecting Rod Length: 6.089"

Displacement: 6.2L / 376c.i.

Piston Volume: 0cc Flat tops

Compression Ratio: 10:7 with 68cc LS3 Heads


Horsepower Rating: Up to 700whp


Engine Block: New Aluminum LS3 Block

Crankshaft: New Gen 4 58x OEM Crankshaft

Pistons: Hypereutectic with and coated skirts.

Connecting Rods: Reconditioned Gen 4 OEM connecting rods.

Main Fasteners: New GM Main Bolts

Main Bearings: King XP-Series Race Bearings

Rod Bearings: King XP-Series Race Bearings

Cam Bearings: Durabond one piece bearings


HotRod LS3 Shortblock

  • Select the 58x for any Gen 4 configuration engines or if you are swapping this engine into an older Gen 3 configuration vehicle you can select the 24x option.