drill yourself, on high bite you may or may not need the extra holes. instead of me trying to stock different apps is just simpler to drill them out as necessary.

keep in mind that these pistons are designed to be tuned, you will have to drill to match your conditions. dont expect to drop them in and press go! most are shipped with 1.1 comp and 1.2 rebound. we are finding that you can get away with much larger rebound and aux holes as well. Plan on spending a day at the track testing and tuning, as time goes on we will have setups on the site and within the next few days i will add a FAQ section and tuning tips along with some demonstration video clips!