Overview Reviews Product Description This service kit is intended to help installers with 25460 or 25485 arms that have oversized or aftermarket knuckles. This insert kit includes 2 knuckle inserts, retaining circlips, castle nuts, and cotter pins. Product Videos Custom Field Product Reviews Write a Review Write a Review × SPC Performance SPC Knuckle Insert Service Kit (Works w/ 25460 & 25485) Rating * Select Rating 1 star (worst) 2 stars 3 stars (average) 4 stars 5 stars (best) Name Review Subject * Comments *