Patented Protection! Differential Integration and Reinforcement System - reinforce your differential case and improve your car's IRS operation and traction with the DIRS! 100% satisfaction guaranteed.   New two-piece transformative product from Per4Mance Development:- Part one attaches the differential using the lower two main case bolts and the three lower case bolts to reinforce the differential.- Part two attaches to the rear cross-member and carries an OEM differential bushing (just like the two in the rear cross-member) to add a third, triangulated integration point to "attach" to the reinforced differential.   Features: - American made and CNC machined T-6061 billet aluminum - OEM differential bushing - ARP fasteners (or equivalent)/North American made galvanized bushing bolt - P4D tool-less inserts for cross-member attachment - Hard anodized coating in black   - Access and channel for drain plug   User reported observations and benefits: 1) Product Quality and Packaging2) Strength and Robustness3) Improved rear-end dynamics including increased traction/less wheel hop4) No noticeable increase in NVH   WILL NOT WORK WITH aFe EXHAUST! IMPORTANT: Use of the DIRS may impact the manufacturer's warranty on the differential. Purchaser assumes all responsibility for installation and use.