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Circuit Werks Differential Brace Rx7 FD3S

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Old Dec 30, 2023 | 02:40 AM
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Circuit Werks Differential Brace Rx7 FD3S

Hello
I have buy a new Differential Brace from Circuit Werks.
Do you have experience with the accuracy of fit?
I have problems with my brace on my car.
The car is OEM RX7 FD3S no crashes or other problems.
The OEM Parts fit.

BR
Meik







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Old Jan 8, 2024 | 11:19 AM
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No experience with that company but fitment issues are common for custom, aftermarket parts sadly
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Old Jan 8, 2024 | 11:36 AM
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it’s a long shot, but some of it may possibly be with the way the diff housing was last bolted solid to the PPF, the current PPF adjustment position, possibly combined with the how the diff support bushings may have worn/settled over time. It may be a matter of loosening some of those items up and using some “persuasion” to see if will align better.

Worse case some minor grinding on the holes may be necessary to account for what otherwise might have been a sloppy jig or fabrication technique. It appears to have been welded together some, which has the possibility of shrinking or expanding the part positions if not performed with proper care.
.
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Old Apr 17, 2024 | 10:42 PM
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The Circuit Werks brace is COPY of the HPP 2in1 Diff Cradle/Brace......and a **** poor one.
Here's the REAL McCoy:
https://www.rx7club.com/market/11535...20diff%20brace
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Old Apr 20, 2024 | 02:27 AM
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Send that junk back and get your money back. Get the real one.
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Old May 3, 2024 | 11:52 AM
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Agree with a few comments in here. I would go with the original, but will also agree that you might have to loosen the PPF and manipulate everything to fit. Bushings over time, stress on the chassis will cause some elements to not align perfectly. I have helped install the HPP on a friends car and we had to massage it to fit as well.
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Old Jan 15, 2026 | 04:35 PM
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Originally Posted by tomsn16
The Circuit Werks brace is COPY of the HPP 2in1 Diff Cradle/Brace......and a **** poor one.
Here's the REAL McCoy:
https://www.rx7club.com/market/11535...20diff%20brace
Glad I read this. I thought it was the same. Any benefit to this over something like the Banzai?

I have a 93, I was thinking of doing the JP3 Subframe and some sort of Diff Mount. Would that be overkill?
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Old Jan 16, 2026 | 10:53 AM
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Originally Posted by supertonggi
Glad I read this. I thought it was the same. Any benefit to this over something like the Banzai?

I have a 93, I was thinking of doing the JP3 Subframe and some sort of Diff Mount. Would that be overkill?
The HPP 2&1 is both a diff BRACE ( protects the PPF and your Grandmother can launch the car like a bandit ) and a diff CRADLE ( prevents case cracking ).
Not familiar with a JP3 subframe.
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Old Jan 16, 2026 | 11:15 AM
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Originally Posted by tomsn16
The HPP 2&1 is both a diff BRACE ( protects the PPF and your Grandmother can launch the car like a bandit ) and a diff CRADLE ( prevents case cracking ).
Not familiar with a JP3 subframe.
The jp3 subframe kit pretty much adds the subframe reinforcement found in 94 and newer cars. Not available in 93.

I'm leaning in ordering your HPP kit when I redo all the bushings in the future. It's a project so I want to do it in phases vs buying early and letting it sit. Sucks I missed all the BF sales! (Also being 10 years too late on many things)
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Old Jan 16, 2026 | 12:08 PM
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Originally Posted by supertonggi
The jp3 subframe kit pretty much adds the subframe reinforcement found in 94 and newer cars. Not available in 93.

I'm leaning in ordering your HPP kit when I redo all the bushings in the future. It's a project so I want to do it in phases vs buying early and letting it sit. Sucks I missed all the BF sales! (Also being 10 years too late on many things)
The JP3 subframe should work fine with the HPP 2&1.
And the HPP fits like a glove...over 250 sold to date.
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Old Jan 20, 2026 | 03:13 PM
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Originally Posted by tomsn16
The JP3 subframe should work fine with the HPP 2&1.
And the HPP fits like a glove...over 250 sold to date.
great to hear. I will be purchasing one in the future, a JP3 Subframe mount and the HPP2&1. Thanks for the info!
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