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 longblock in 500whp NA setups or in boosted setups up to the 700whp mark with the optional ARP head stud upgrade.


HotRod Series LS3 Longblock


Bore: 4.065"

Stroke: 3.622"

Connecting Rod Length: 6.089"

Displacement: 6.2L / 376c.i.

Piston Volume: 0cc Flat tops

Compression Ratio: 10.7:1 with 68cc LS3 Heads


Horsepower Rating: Up to 700whp on Boost with the ARP Headstud option

Horsepower Output: Up to 500whp Naturally Aspirated


Engine Block: New Aluminum LS3 Block

Crankshaft: New Gen 4 58x OEM Crankshaft

Pistons: Hypereutectic with 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


Cylinder Heads: New Square Port LS3 Heads

Valves: 2.165" intake / 1.590" exhaust

Valve Springs: .660" Lift Dual Valve Springs w/ steel retainers

Camshaft: Application Specific Spec'd Camshaft

Timing Chain: GM HD Timing Chain

Lifters: OE Replacement LS7 Lifters

Push Rods: 5/16 Diameter Chromoly Pushrods

Rocker Arms: New LS3 Rocker Arms w/ trunnion upgrade

Head Fasteners: GM Head Bolts or Optional ARP Head Studs

Head Gaskets: GM MLS Head Gaskets

Oil Pump: Melling High Pressure Oil Pump


HotRod LS3 Longblock