I was wondering how hard it is to install underdrive pullyes. I just bought my 1st z, 93 tt . The car came with alot of mods and wanted to know if its worth the money and about how hp gain could i expect. And also what brand you all recomened. And also my cousin recomened taking the cats and resinators off to add more hp he told me i would gt around 40-50 more hp is this true and worth it. Said would cost around 400-500 for the removal and welding of new piping. Right now im running 363whp and 390wtrq. My goal is reach a little over 400whp so im hoping these two mods will get me there. Is it worth it?

 

https://www.zdriver.com/forum/search.php

 

if you don't know how hard it is to install new pulleys, then you don't need to do it. http://www.czp.us/Cart/description.p...966.76.112.226

 

It's all relative. I helped two guys put their u/d crank pullies on in the same day. You need tools, time and patience. This write-up will help you alot. U/D Pulley Install
I didn't use the write-up cuz I already new what to do from doing my T-belt.

 

As far as what brand, get a UR underdrive. It's been proven to be reliable. As far as your friend telling you to get rid of your catz and resonators and getting 40-50hp, he's full of it. Go ahead and get downpipes and testpipes, it'll help a lot, but will not give you 40-50hp. Go by the stage charts for mod sequences.