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A Van Down by the River
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I honestly think any of the diff braces are good enough for 800whp, probably even up to 1000whp. At that point, you might want to look into the best available.
 

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Ur definately right on that one lol! I was running the Bwoody one and making over a 1000 hp and it did fine lol. I put the DIRS one in just cause it looked cooler lol but I highly doubt it does anything more than the Bwoody one did.

I got some Bwoody suspension stuff if anyone is interested. Its been sitting in a box in my garage.

I honestly think any of the diff braces are good enough for 800whp, probably even up to 1000whp. At that point, you might want to look into the best available.
 

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Discussion Starter · #7 ·
I honestly think any of the diff braces are good enough for 800whp, probably even up to 1000whp. At that point, you might want to look into the best available.
That’s my thought. Per4mance development lists it as “800 whp limit”, I think it’ll be good for most power levels (around 900)
 

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A Van Down by the River
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2019 Challenger Hellcat Redeye Widebody
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I have the Per4Mance Development Billet brace and billet race brace for the front side of the rear diff rather than the DIRS model. My school of thinking is that I dont want the diff to move at all, in any direction period. The DIRS has a rubber mounted bushing just like the stock mounts but adds a third contact point on a different axis. I think it probably works really well but couldn't be as solid as one with ZERO give. Isn't that also the point of the lock-out kits several companies make for the factory diff mounts where you replace the rubber bushings in the stock mounts with steel that hold that diff exactly where it needs to be with zero movement? Someone correct me if I am wrong, this is just my understanding of things. I ordered the lock-out kit already but have not gotten it nor installed it yet, but it seems like the dedicated drag guys all use it. I understand that I may feel more driveline vibration but that is a small price to pay in the grand scheme of things if this really beefs up the differential and prevents diff explosions!
 

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A Van Down by the River
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8,137 Posts
I have the Per4Mance Development Billet brace and billet race brace for the front side of the rear diff rather than the DIRS model. My school of thinking is that I dont want the diff to move at all, in any direction period. The DIRS has a rubber mounted bushing just like the stock mounts but adds a third contact point on a different axis. I think it probably works really well but couldn't be as solid as one with ZERO give. Isn't that also the point of the lock-out kits several companies make for the factory diff mounts where you replace the rubber bushings in the stock mounts with steel that hold that diff exactly where it needs to be with zero movement? Someone correct me if I am wrong, this is just my understanding of things. I ordered the lock-out kit already but have not gotten it nor installed it yet, but it seems like the dedicated drag guys all use it. I understand that I may feel more driveline vibration but that is a small price to pay in the grand scheme of things if this really beefs up the differential and prevents diff explosions!
Solid is probably overkill for 98% of Hellcat owners, that's why the DIRS exists.
 

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$55 seems reasonable to me geeeez. Every little thing one can do to limit the chance of their Hellcat being stolen helps. This is a great idea thanx for this.
 
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