i noticed when watching the pros their cars do not slap even on a flat landing? i have been messing with oils and pistons but cant seem to get rid of it. the stock setup is too light for my track. i run on an indoor track with big doubles. i tried the #3 pistons but it wasnt consistent around the track. i like the way #2 pistons feel but bottoms out too easy. right now im at 35wt in the rear. green springs.