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ASP LS1 underdrive pulley kit reduces parasitic power losses associated with high accessory speeds, freeing up additional HP. It also reduces the rotating inertia on the front of the crankshaft allowing for faster revving. We have seen just over 13 rear wheel hp increase with this kit installed on stock LS1s.
Uses Gates Belts: K040410, K060775
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The car now runs alot better, more miles to the gallon, high rpm revs, and close to 19 more horsepower(18.7hp).
slp-headers, high flow cats, y-pipe, magnaflow exhaust, sphon torque arm, sphon tubular sub frame connectors, sphon drive shaft, sphon rear tubular adjustable lower control arms , three inch steel drive shaft rated to hold 1,200 horse power, 4.11 moser 12 bolt rear, short throw shifter, slp flow pac, drilled and slotted bear rotors and ebc green stuff pads on all four corners, 20% tint all around, 90 mm slp mass air flow sensor, and asp 25% underdrive pulley.
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