underdrive pulley
I have one. They are better, less vibration on the crank and chain. the stock one is fluid filled. Plus it is SFI approved if you go March like I did. It was a sexy looking piece as well. Plus it comes with an overdrive pulley for the Alternator so you dont loose any battery power.
^^^^^^^^Incorrect/bad info..funny........ Stock is not fluid filled.Wake up...... I have a March too... The general consensus is that that ATI is the best out there.
Last edited by SOMbitch; Mar 10, 2009 at 07:44 PM.
almost all of them are the same. look for ones that have a raised lip so you don't throw the belt off at high rpm. Just keep an eye out for one that is on sale, unless you need this one now. I have a powerbond one and I have never had a problem with it.
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you can make around 10rwhp with a cam. You really only see it in the top end. I would only put one on when doing a cam. Its one of those might as well while you are in there type of things.
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