I just bought a set of GReddy underdrive pulleys, but an a bit leary of putting them on because I hear that the removal of the airpump will cause the car to idle rich and potentialy clog my new high flow cat. This I dont want to do so I was wondering if anyone knows of a longer belt that can be used with these pulleys but retain the airpump?

 

the reason why you should buy that pulley it because you want to remove the airpump. otherwise you are suppose to go for the main underdrive pulley made by rp. i would not try to use a longer belt because the measurements will be all off.

 

The only reason that I bought the pulleys is because I got a great deal on them from a friend. If I can't use them now safely its not a big deal I'll just keep them till I can.