The Cusco RS type LSD is designed with low initial torque in order to improve response while reducing clutch plate wear. A chromemoly casing with forged internal components and a unique "through oil system" provide increased durability under severe use. Most LSD's feature multiple ramp angles for tuneability


Gravel Specification -
CU-180C15 Cusco Front LSD 1.5way 5MT $1150
CU-184C15 Cusco Front LSD 1.5way 6MT $1150

CU-183L2 Cusco Rear LSD 2way R160 $1095
CU-182L2 Cusco Rear LSD 2way R180 $1095

Tarmac Specification -
CU-180C1 Cusco Front LSD 1way 5MT $1150
CU-184C1 Cusco Front LSD 1way 6MT $1150

CU-183L15 Cusco Rear LSD 1.5way R160 $1095
CU-182L15 Cusco Rear LSD 1.5way R180 $1095


RST-1215 Center 20kgf Viscous LSD 5MT $975


Recommended for rally or drag racing use. Increases resistance torque from 4kgf-m/100rpm (stock) to 20kgf-m/100rpm. Improves response time and reduces heat generation during extreme wheelslip. Will increase understeer in tight cornering.

RST-1902 STi Front 1.5way LSD 6MT $1625
RST-1902T STi '06 Homologation Front LSD 6MT $1820
RST-H190 STi '08 Homologation Front LSD 6MT $1950


Homologated front LSD for use in the 6-speed gearbox. Clutch type 1.5way LSD ('06 homologation is convertable between 1.5way and 1way for optimum gravel or tarmac setting). '08 homologation version converts between 3 different ramp angles.

RST-1902RK STi Front 6MT LSD Overhaul Kit $442
RST-1951RK STi Rear R180 LSD Overhaul Kit $364
RST-1221 STi '02-'05 6MT DCCD Overhaul Kit $1040
RST-1221B STi '06-'08 6MT DCCD Overhaul Kit $910


Overhaul kits contain clutch discs and additional components. A range of disc thicknesses and cone washer thickness allows for tuning of the initial torque to suit conditions.

RST-1953 STi Pressure Ring Set R180 (STi) $325


Increases the pressure angles of the stock R180 plated LSD (STi models) from 45 degrees to 60 degrees in order to improve throttle sensitivity for competition use. The LSD will operate quicker and more effectively. This is the optimal way to improve the performance of the factory STi rear LSD. Homologated for N11 & N12.


RST-1903 Subaru Helical Front LSD $1002
RST-1903X Helical LSD Install Kit (Req'd up to '05) $95


Recommended for street & track use. This torque biasing limited slip differential provides smooth, consistent, and quiet operation. Sealed maintenance free operation with no special lubrication requirements. Improves traction at the front wheels allowing the driver to get on the power as early as possible out of a corner. Install kit includes stub axle set making it a direct swap for all early Subaru 5MT gearboxes.

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