KellTrac S550 S650 Mustang Differential Bushing Upgrade Kit, RUBBER KTI-BUK15RD

Avoid headaches and replace those pesky failure prone OE or aftermarket diff bushing kits with this KellTrac S550 S650 Mustang Differential Bushing Upgrade Kit. This kit includes everything you need to upgrade your S550's Differential bushings to the best engineered kit on the market! This kit features a proprietary rubber and billet bushing design with high quality 12.9 fasteners sourced from Italy. This kit presses into the stock IRS subrame like stock and the bolts install without any modifications or fabrication required. *THIS KIT IS A FULL STOCK REPLACEMENT THAT REQUIRES REMOVING THE IRS SUBFRAME ASSEMBLY FOR INSTALLAION*   Kit Includes: (4) 12.9 High Strength Alloy Steel Bolts, (2) Class 12 nuts, (6) HSS Washers, (4) Locking Washers (4) Rubber+Billet Diff Bushings 25% more clamp force than next strongest offering Industry's strongest bolts, ASTM A574, 170,000psi Tensile Strength High Quality, High Strength Class 12 Nuts High Quality HSS Zinc Coated Standard AND Locking Washe