Review on BBK 1598 Underdrive Pulley F Body by Leslie Matlak

Ordered this for my mud truck to slow the belts down a bit as I had a problem with the power steering belt at 7000rpm. Easy to install, can't really tell the difference in performance with a 600hp motor, but it fixed my belt problem. A few things to keep in mind if you are considering installing them. Factory belts (at least Chevy 87 pickup) will not fit, Gates part numbers are as follows: Old: K050420 P/S: 7370 Application Alternator belt for '87 Camaro with 5.7 liter engine Power steering belt for Chevy K20 pickup 79 year old with a 5.7 liter engine. The only other issue I had with installation was that the alternator pulley was so thick I couldn't use the stock lockwasher, but it did bind the threads a bit and so far so good. Hope this helps someone.