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Old 01-06-2021, 11:33 AM   #1
Ramsfan6239
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Default Cheapest way to R180 swap 04 WRX - Keep 5x100's

So I have a 2004 WRX with a 6 speed swap, stock R160 rear diff.

I've got a built motor, 20g ect ect. Planning on atleast 400 whtq, maybe more we'll see how she goes.

I'm going to need a R180 swap to handle the power, the only issue is I just purchased a brand new set of 5x100 RPF1's.

What's the absolute cheapest way to get a R180 diff in there to keep my wheels? I'd prefer not to have to swap 04 STI knuckles/brakes as it'll get really expensive quick.

I understand I'll probably need a custom driveshaft/rear axles.
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Old 01-06-2021, 12:34 PM   #2
snow_bound26
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Get the STi driveshaft and contact suberdave. Here's his thread about creating the hybrid cv axle

https://forums.nasioc.com/forums/sho....php?t=2048240
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Old 01-06-2021, 05:40 PM   #3
AceKingNYC
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Alternatively - you can swap in the R180 and axles & the 04 STI knuckles, and get rotors from KNS to specifically keep your rear 2 pots (assuming you have the 4/2 pots).

Not the cheapest - but avoids having to purchase rear brembos & pads

But ultimately the absolute cheapest way is as suggested above: Hybrid axles hands down
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Old 01-07-2021, 09:06 AM   #4
Ramsfan6239
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Quote:
Originally Posted by snow_bound26 View Post
Get the STi driveshaft and contact suberdave. Here's his thread about creating the hybrid cv axle

https://forums.nasioc.com/forums/sho....php?t=2048240
Awesome! I just sent him an email on his website.

Quote:
Originally Posted by AceKingNYC View Post
Alternatively - you can swap in the R180 and axles & the 04 STI knuckles, and get rotors from KNS to specifically keep your rear 2 pots (assuming you have the 4/2 pots).

Not the cheapest - but avoids having to purchase rear brembos & pads

But ultimately the absolute cheapest way is as suggested above: Hybrid axles hands down
Yeah I think I'm doing hybrid axles, thanks for the tip.
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Old 01-07-2021, 02:50 PM   #5
Fierysun
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Another option is to get a Cusco R160 1.5 way diff and keep everything the same.
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Old 01-07-2021, 05:30 PM   #6
Ramsfan6239
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Quote:
Originally Posted by Fierysun View Post
Another option is to get a Cusco R160 1.5 way diff and keep everything the same.
I heard they're noisy and clunky, not really looking for that. Unless they fixed it or there is a solution?
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Old 01-07-2021, 07:10 PM   #7
kenliu84
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Quote:
Originally Posted by Fierysun View Post
Another option is to get a Cusco R160 1.5 way diff and keep everything the same.
Do you have experience with it?
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Old 01-09-2021, 01:38 AM   #8
Unabomber
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Quote:
Originally Posted by Ramsfan6239 View Post
I heard they're noisy and clunky, not really looking for that. Unless they fixed it or there is a solution?
You hear wrong. I have one and its quiet as a church mouse. Now if you go and use the wrong fluid....it clicks. But if you use Cusco fluid it ain't. And ensure you have it set up with as light engagement as possible if you have a street car.
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