Which cars does the Type RS 1.5-Way Front LSD for VBH fit?

Cusco USA lists part number LSD 180 C15 for the Subaru WRX (VBH, 2022-2026), the Subaru Crosstrek (GT7, GP7, 2013-2023), the Subaru Legacy (BD5, BE5, BL, BM9/BMF, 1995-2014) and the other cars listed under Applications. The Type RS 1.5-Way Front LSD for VBH replaces the factory front differential, so check the notes on this page for any model or transmission limits before ordering.

What does 1.5-way mean?

A 1.5-way LSD locks fully under acceleration and partly under deceleration. The extra coast-side lock ties the driven wheels together when the driver lifts or brakes, which steadies the car on corner entry and under trail braking, at the cost of a little more push than a 1-way. It is a common choice for track cars.

How does the Type RS differ from the Type MZ?

The Type RS sets its initial torque with coil springs that push in the same direction as the activation pressure, so it engages smoothly and quickly with a lower initial torque. The Type MZ uses a high-pressure cone spring, giving it the highest initial torque of any Cusco LSD and a stronger, more linear lock suited to competition.

What initial torque does it use?

Cusco quotes 3 to 5 kgf-m of initial torque for this unit, which is the locking force the differential applies before the engine sends any power through it. Lower values feel smoother on the road; higher values hold the inside wheel harder on corner exit, and on the Type RS the figure can be changed by adding or removing RS springs.

What should I know before installing it?

On a front differential the transmission must be removed and split to fit the Cusco unit, so most owners have a drivetrain specialist do it. Plan on fresh gear oil, since Cusco sells its own LSD oil for clutch-type differentials, and read the notes on this page for any extra parts Cusco says the job needs.

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Description

Cusco Type RS 1.5-Way Front LSD for VBH Subaru WRX, Crosstrek, Legacy and Outback

Cusco’s Type RS 1.5-Way Front LSD for VBH and related Subaru models replaces the factory front differential with a clutch-type limited-slip unit that uses coil springs to set its initial torque. As a 1.5-way it locks fully under acceleration and partly on deceleration, which steadies the car on corner entry. Engagement is smoother and quicker than Cusco’s MZ series, and the low initial torque keeps tight turns easy when the diff is not working. Choose it for a car that is driven on the road and pushed hard on track.

Features

Coil-spring initial torque system with RS springs inside the pressure rings
1.5-way action: full lock on acceleration, partial on deceleration
Smoother, quicker engagement than the Cusco MZ series
Clutch-type multi-plate design in place of the factory front differential

Specifications

Cusco part number: LSD 180 C15
Type: Type RS
Action: 1.5-way
Cusco setting: 1.5-way (1-way 45/0 & 1.5-way 45/15 deg)
Initial torque: 3-5 kgf-m (approx. 22-36 lb-ft)
Position: Front differential

Applications

Subaru Impreza WRX Wagon: GGA | 2001-2007
Subaru Forester: SF9 | 1998-2002
Subaru Legacy: BD5 | 1995-1999
Subaru Impreza 2.5RS Coupe: GC8 2-Door Coupe | 1998-2001
Subaru Crosstrek: GT7 | 2018-2023
Subaru Legacy / Outback: BL (Sedan) / BP (Wagon) | 2005-2009
Subaru Forester: SG9 | 2003-2008
Subaru WRX: VBH | 2022-2026
Subaru Impreza: GC8 | 1993-2001
Subaru Legacy: BE5 | 2000-2004
Subaru Impreza WRX: GDA | 2002-2007
Subaru Crosstrek: GP7 | 2013-2017
Subaru Legacy: BL (Sedan) / BP (Wagon) | 2005-2009
Subaru Outback: BR9 | 2010-2014
Subaru Legacy Outback: BG5 | 1995-1999
Subaru Legacy: BM9/BMF | 2010-2014
Subaru Impreza WRX Hatchback: GH8 | 2008-2014

Notes

Fitting the Type RS 1.5-Way Front LSD for VBH means removing the transmission and splitting it to swap the differential; installation labor is not included
Cusco: Replacement Plate Set: LSD-001-21, Initial Torque Check Service Tool: LSD-SST-16

Frequently Asked Questions

Which cars does the Type RS 1.5-Way Front LSD for VBH fit? Cusco USA lists part number LSD 180 C15 for the Subaru WRX (VBH, 2022-2026), the Subaru Crosstrek (GT7, GP7, 2013-2023), the Subaru Legacy (BD5, BE5, BL, BM9/BMF, 1995-2014) and the other cars listed under Applications. The Type RS 1.5-Way Front LSD for VBH replaces the factory front differential, so check the notes on this page for any model or transmission limits before ordering.
What does 1.5-way mean? A 1.5-way LSD locks fully under acceleration and partly under deceleration. The extra coast-side lock ties the driven wheels together when the driver lifts or brakes, which steadies the car on corner entry and under trail braking, at the cost of a little more push than a 1-way. It is a common choice for track cars.
How does the Type RS differ from the Type MZ? The Type RS sets its initial torque with coil springs that push in the same direction as the activation pressure, so it engages smoothly and quickly with a lower initial torque. The Type MZ uses a high-pressure cone spring, giving it the highest initial torque of any Cusco LSD and a stronger, more linear lock suited to competition.
What initial torque does it use? Cusco quotes 3 to 5 kgf-m of initial torque for this unit, which is the locking force the differential applies before the engine sends any power through it. Lower values feel smoother on the road; higher values hold the inside wheel harder on corner exit, and on the Type RS the figure can be changed by adding or removing RS springs.
What should I know before installing it? On a front differential the transmission must be removed and split to fit the Cusco unit, so most owners have a drivetrain specialist do it. Plan on fresh gear oil, since Cusco sells its own LSD oil for clutch-type differentials, and read the notes on this page for any extra parts Cusco says the job needs.

About CUSCO

CUSCO is the brand of Carrosser Co., Ltd., founded in December 1977 and based in Takasaki, Gunma Prefecture, Japan. Carrosser designs and builds coilovers, limited-slip differentials, clutches, roll cages and chassis parts, sells its steel cages under the Safety 21 name, and competes in every All Japan Championship category from circuit racing to rally and gymkhana. CUSCO USA, a division of Carrosser, is based in Huntington Beach, California.

Additional Information

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Cusco Type RS 1.5-Way Front LSD for VBH Subaru WRX, Crosstrek, Legacy and Outback [LSD 180 C15]

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Cusco Type RS 1.5-Way Front LSD for VBH Subaru WRX, Crosstrek, Legacy and Outback

Features

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Applications

Notes

Frequently Asked Questions

About CUSCO

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