Per4mance Development DIRS Differential Integration & Reinforcement System for 15-23 Challenger, Charger & 300C V8 RWD

Product Code: DIRS
(6 reviews) Write a Review
Usually Ships in 24 to 48 Hours
High Horse Performance is Veteran Owned & Operated

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.


- 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 Packaging
2) Strength and Robustness
3) Improved rear-end dynamics including increased traction/less wheel hop
4) No noticeable increase in NVH 


100% satisfaction guaranteed, return within 30 days of receipt for a full refund.

Use of the DIRS may impact the manufacturer's warranty on the differential. Purchaser assumes all responsibility for installation and use.

6 Reviews Hide Reviews Show Reviews

  • 5
    High performance diff brace

    Posted by Stephon Prude on Mar 21st 2023

    Great product going to be using high HHP to get majority of my parts.. would love to partner with them on this build

  • 5

    Posted by ERNIE ALANIS on Dec 15th 2022

    Brace works great. makes your rear suspension a bit more stiff especially if you have both braces front and rear. Money well spent.

  • 5
    Diff Brace

    Posted by Jon Troiano on Feb 9th 2022

    Nice fit and finish.

  • 5
    Parts arrived quickly and very well packed.

    Posted by Mark Itzstein on Dec 13th 2021

    I love well machine parts that are made stronger than required. This fits the bill.

  • 5
    great item.

    Posted by Dwayne Morales on Jul 17th 2021

    This item is outstanding, it's kind of easy to install. It controlled 95% of the wheel hop, you still need to upgrade the rear suspension. Very satisfied with the item and the wheel hop issue.

  • 5
    Keep your diff in one piece...

    Posted by Ed Serauskis on Apr 2nd 2021

    At times depending upon traction on my M6 Hellcat I would get some wheel hop, since installing it , it feels more planted and as the weather is getting warmer traction is getting good... Haven’t noticed a hop yet and that’s great the machining is excellent in fit and finish, not a hard install great insurance and piece of mind.