Rear Differential Brace

The Per4mance Development DIRS-J Rear Differential Brace is engineered to reinforce and support the differential mounting area for high-performance applications in select Jeep and Dodge SUVs. This system reinforces the differential case, improving IRS operation and traction, especially under the high demands of 700+ HP builds. Constructed from American-made, CNC-machined T-6061 billet aluminum, the DIRS-J features a durable hard-anodized black coating. It incorporates an OEM differential bushing and 304 stainless steel threaded cross-member inserts, utilizing ARP (or equivalent) and Grade 10.9 hardware for robust performance. The design allows for controlled movement via the OEM bushing, ensuring no noticeable increase in noise, vibration, or harshness (NVH). Installation is a direct bolt-on process, reusing factory hardware and typically taking 20-30 minutes. While professional installation is recommended, it is not required. However, two holes will need to be drilled in the rear cross-member for proper installation of the DIRS-J. The product includes all necessary spacers and hardware for a complete kit. This differential brace is intended for street, strip, and road course use. It fits 2015-2021 Jeep Grand Cherokee SRT and Trackhawk models, and 2018-2025 Dodge Durango SRT 6.4L and Hellcat 6.2L models. It is compatible with factory and most aftermarket axles. Please note that use of the DIRS-J may impact the manufacturer's warranty on the differential.