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View Full Version : underdrive pulley??

BIG ED'S 35TH SS
07-08-2007, 02:56 PM
are they worth it how much are they and where do you get them from if they are worth it??
yyz28
07-09-2007, 08:32 AM
Engine spins faster, and on an LS1 are worth about 10HP or so.
2.83rdgen
07-09-2007, 08:54 AM
speedinc.com has a couple of options for them.