"Stock bottom end" refers to a engine thats rotating assembly such as pistons, rods, and crankshaft of the motor are stock or are untouched from the factory.
Guy 1: My whip makes 800 wheel on stock bottom end.
Guy 2: Bullshit man
Guy 1: 2jz brah
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Slang term to describe a built race engine.
That green camaro with the crybaby drive has a Stock Bottom End yo.
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