Cusco MZ rear limited-slip differential, 1.5-way
- Type
- Plated (clutch-type) limited-slip differential
- Ramp setting
- 1.5-way — full lock on power, partial on overrun
- Position
- Rear
- Fits
- GD
- Surface
- Gravel / rally, Tarmac / track
Want this, or something like it?
We can’t take an order yet — supply is still being arranged. Ask, and we will tell you what we know about it and let you know when it is available. What people ask for is what we range first.
Fitment is confirmed, not guessed
A chassis is listed only where the part is on one of our cars or on the manufacturer’s own application list.
Some of this is on our cars
Parts marked On our cars are ones we race. Those descriptions are written from running them, not from a brochure.
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About this part
Fitted into Betsy's standard R180 rear housing, set 1.5-way for some locking on the overrun.
Betsy keeps the standard R180 rear housing with this plated centre in it. The 1.5-way setting means it locks fully on power and partially on the overrun, so the rear axle stays tied together as you come off the throttle into a corner rather than letting one wheel freewheel. On tarmac that shows up as a car that settles earlier and rotates more predictably on the brakes. Paired with the 1-way front it gives a balance we have been happy with across the 2026 tarmac rounds.
Specifications
- Type
- Plated (clutch-type) limited-slip differential
- Ramp setting
- 1.5-way — full lock on power, partial on overrun
- Position
- Rear
- Housing
- Standard Subaru R180
On our cars
This is fitted right now. The description above is written from running it.
Fitment
Subaru R180 rear differential housing. Confirmed for the chassis below — we list one only where the part is on one of our cars or on the manufacturer’s application list.
Before you buy
Why a GDB needs a 3.545 rear diff
The final drive has to match the transfer gear, or the centre diff destroys itself. The arithmetic, and how to read it off a listing.
Reading Subaru STI six-speed gearbox numbers
What TY856 codes and 32000A assembly numbers tell you about generation, DCCD and front LSD — and when they contradict the listing.
Buying used drivetrain parts sight-unseen
What a listing has to state before it is safe to bid, why clutch-type beats helical on stage, and the Japanese terms that carry the real information.