lacerdaschoon, if you enjoy nearly just as fast track times and power as the 178mm pulley and a cheaper price, faster times than most any 181mm and faster times than 185mm pulleys due to heat issues then get the code3.

If you enjoy lots of pulley failure issues and engine damage from shards of pulley fragments flying all over your engine bay then get the 181mm or 185mm pulley. There are several ongoing threads of many many members having issues with pulley failures, having metal shards damage their cars and getting towed home only to have their cars to sit in their garages for extended periods of time waiting on a fix and bearing replacements.

Do a little reading up on the forum, you will see what I mean.

When you post a thread like this you will typically only get opinions not a lot of facts.

To date (to my knowledge), the 178mm and code3 pullies have posted the fastest times. The only exception was 1 car that had significantly more mods and nitrous. I have a code3 and i datalogged my car then datalogged it again with belt spray on and there was zero difference in boost so i know i do not have any belt slip.

In order to know what power you are really making you will need not only dyno sheets but track times as well since some dynos read higher than others. Some people dyno mid to upper 350whp range yet run slower times than others dynoing less.

When it comes to tuning cars it really pays to do your research.