C.Kiger Posted December 27, 2016 Report Share Posted December 27, 2016 Hello everyone, recently my wife decided to purchase a pcm tune for my SS as surprise for Christmas, which I was supposed get myself for Christmas, so I have some extra funds, SO is an underdrive pulley worth it, I've read so many mixed opinions, My speed shop says there will be a huge difference in response, I know I should do it before the tune for sure, so any advice would be great. Also what brand everyone would recommend would be awesome, I've been looking at these moto blue' -- https://www.rpmoutlet.com/gmsuvasp.htm Thanks! Quote Link to comment Share on other sites More sharing options...
1BAD2K Posted December 28, 2016 Report Share Posted December 28, 2016 Honestly I don't think you will notice any difference. Does your truck have full exhaust already? If not, I'd look into headers instead. Quote Link to comment Share on other sites More sharing options...
C.Kiger Posted December 28, 2016 Author Report Share Posted December 28, 2016 Yup, Full exhaust longtubes no cats , tranny worked, cai, and this and then the tune if I go that route Quote Link to comment Share on other sites More sharing options...
SilveradoJakee Posted February 9, 2017 Report Share Posted February 9, 2017 Wont notice anything unless its boosted. My take in this is the pully is good enough now, why mess with it all when its not worth it? New belt, new belt size. Look into a cam swap or e fans or or stall or heads. Quote Link to comment Share on other sites More sharing options...
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