I looked online and found on summitracing.com a underive pulley and alternator pulley Foreal about 200 seems too pricey so I was wondering is it worth it is there any HP gain?

 

I have the trick flow one from summit and I noticed that is revs a little easier . I did my swap along with long tube headers and Efans so I noticed a diff but how much from the pulley I couldn't tell ya . But that kit is nice because it comes with the alt pulley so u don't have to worry about ur voltage suffering and I tend to go for name brand over no name cheaper because if and when u have a problem the bigger comp. tend to stand behind there product more because they have a bigger reputation to lose. I hope that helped answer ur qeustion.