so i got my 17% helix pulley and the pulley puller and tensioner tool today in the mail... i cant wait to put it on and c the diffrence... But is there anything else that i need to change or do while i am adding the pulley to the car?? let me know if i do Thanks Guys

 

With a 17% pulley, you should install a shorter drive belt as well.

 

You will need to change you driving habit or you will get a ticket soon.
Have fun.

 

As mentionned earlier, get a shorter belt.

You might also want to get an ECU software (GIAC, MTH, ...) to fully take advantage of the pulley. Don't get me wrong, the stock ECU will work, but an aftermarket ECU software will help.

congrats on your new toys and enjoy them!

 

there is no question ; you must do a shorter belt. a change of underoos is also strongly recommended .