Wiseco Mitsu Evo 4-9 4G63 Asymmetric Skirt Bore 86.00mm - Size +.040 - CR 9.5 Piston Set 2020-polaris-rzr-900-esi9953354 no jet changes are required

no jet changes are required with just a K&N filter element

Year Make Model Submodel 1982-1987 Honda Z50R Base 1986 Honda Z50RD Base

1981 Mercury Marquis Base 1971-1973

2014-2015 Audi R8 Base 2011-2012

Wiseco Mitsu Evo 4-9 4G63 Asymmetric Skirt Bore 86.00mm - Size +.040 - CR 9.5 Piston Set 2020-polaris-rzr-900-esi9953354 no jet changes are requiredProfessional Series forged racing pistons from Wiseco are no expense spared pistons designed for the serious racers and builders. Packed full of custom level performance and durability features and provided with premium rings, Professional Series pistons are designed and built for use in heavy to severe duty race builds. Remove your limits with Wiseco? s Professional Series.