Chevy LS1 4.125" 393ci Forged Rotating Assembly Kit [3.905] The Speedmaster extra-wide rigid bands

The Speedmaster extra-wide rigid bands feature band linings with carbon fiber friction material for higher coefficient of friction for higher torque capacity and the ability to produce quicker

or another that's set up the same

These durable but lightweight aluminum pumps push up to 35 gallons of water per minute of coolant circulation

Speedmaster high-volume oil pumps give you an additional 20 to 25 percent of much-needed oil volume for your performance application

Upgrade your transmission with the Speedmaster heavy-duty forward clutch hub

Chevy LS1 4.125" 393ci Forged Rotating Assembly Kit [3.905] The Speedmaster extra-wide rigid bandsSpeedmaster Chevy LS1 rotating assembly featuring a precision ground forged 4340 steel crankshaft, 4340 chromoly H beam connecting rods, and forged flat top pistons matched to your bore size.