The new plasma piston\sleeve sets FOX sells for its 35 have a small problem. The skirt of the piston is .037 inch longer than the typical FOX 35 piston. These will interfere on some but not all model FOX 35s. FOX has been made aware of this problem by Marvin and has corrected it. So if you have one of these parts be careful and check it when you install the parts in your motor. Or send it back to FOX for modifying
Regards
Randy