This Lonestar Racing Frame Gusset Kit will help strengthen the weaker areas of the frame. It comes with 16 chromoly washers to to strengthen the a-arm mounting points,6 plates to strengthen the trailing arm mounting points, sway bar gussets to strengthen sway bar mounting points, 4 triangular gussets and 1 gusset plate to strengthen the front of the chassis. For race applications we recommend the rear frame skid plate which is sold separately. 

Instructions: RZR_XP1K_Gusset_Kit.pdf (shopify.com)