Less blown belts

The factory non-adjustable clutch weights leave massive amounts of power on the table

Rev limit raised in high and low gears to 9000 RPM

The stock driven spring actually coil binds which stops the shift

Gasket Top End Kit / RZR XP 900 ('11-14) Head Gasket Thickness:Stock Thickness Less blown beltsThis high quality Cometic top end gasket kit for you 900 RZR meets or exceeds OEM specs. Comes with 1 base gasket, 1 head gasket, 2 cover gaskets, 1 chain tensioner gasket, 2 exhaust gaskets & 8 valve seals. Available for the standard top end or for a 96mm big bore motor and head gaskets available in different thicknesses depending on application. This high quality Cometic top end gasket kit for your 2011 14 900 XP RZR meets or exceeds OEM specs.