Custom Cut Helix

and the X3 and YXZ Full Systems

BMP Custom Primary Spring

This allows you to adjust from 12 grams(lighter than stock for really high altitude)

Heavy Duty Head Studs / RZR 1000 Category_Default Category/SLED/Ski-Doo/GEN5 850 E-TEC Custom Cut HelixThese heavy duty ARP head studs are a must when going big! We highly recommend head studs when going with a big bore kit, especially on the 1000 motor. Basically, anything over 140hp we recommend a head stud install. Comes with studs, washers, nuts, lube, and side bolts. Heavy duty ARP head studs for RZR 900 1000 XPT motors Needed when adding a big bore or turbo Includes: studs, washers, nuts, lube and side bolts Directions for install: (Tighten from