Just wanted to get some opinions on this size pulley from ZZP on my stock internals and GM tune. I've posted a similar topic about this and found that a 3.1 is the lowest for a GM tune. I'm just trying to gain more info. I like the pulleys from smoothflow as well so I'm debating between the two. Also, has anyone experimented with ZZP's pulley puller? Any ideas/thoughts/comments are greatly appreciated. Thanks Guys.

the ZZP pully works awesome the 3800 guys thats all they use everything ZZP has is awesome, i'm running the modular pully system on my 3800 best on the market hands down



JBO since July 30, 2001