pistons are brand specific....so in reality u need to use a Sportwerks piston....Unless u have buddy's with other buggy's u could try different brand pistons.......u could also drill the 2 hole to a 4 hole...if u had the proper size bit...but then would obviously be stuck running a 4 hole.....why do u want to change it anyways ? just because guys at the track have it ? do u need extra pack ? are u scrubbing speed off on the jumps ?