hey my ssm90 kit awaits to be put on my car. I got a gtp belt setup for it, and i have a stock gtp pulley (3.5 correct me if im wrong.) Would that pulley be fine? My mods will be 2.5" dp, ubend delete, mufflers, CAI, ported LIM and s/c. If its too small i would just order a ssm90 pulley from zzp, if i did i would get the 3.8. On their site it says all ssm90 pulleys the same as a gtp pulley .3 smaller? or is that bs? Im just tryin to make sure here i dont want my KR to go though the roof. thanks