Wiseco Mitsu Evo 4-9 4G63 Asymmetric Skirt Bore 86.00mm - Size +.040 - CR 9.5 Piston Set 2020-polaris-rzr-900-esi9953354 9% CFM GAIN (passenger side)

9% CFM GAIN (passenger side) to your engine and provides an increase of 27

1981 Mercury Marquis Base 1971-1973

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

5 CL ET54 CB84 Matte Black Wheel -82mm PFS/Clip Req

Wiseco Mitsu Evo 4-9 4G63 Asymmetric Skirt Bore 86.00mm - Size +.040 - CR 9.5 Piston Set 2020-polaris-rzr-900-esi9953354 9% CFM GAIN (passenger side)Professional 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.