-10%
Cusco LSD RS1.5WAY (1 & 1.5) Front For GC8 GDA Impreza BR9 BM9 Cusco CUSLSD 180 C15
Click to zoom in

Cusco LSD RS1.5WAY (1 & 1.5) Front For GC8 GDA Impreza BR9 BM9

Cusco
CUSLSD 180 C15
4996338017017
Differentials
5 Units In Stock - Ships Next Business Day
$ 1,480.00 $ 1,332.00
$ 1,332.00

SKU: LSD 180 C15 | UPC: 4996338017017

Cusco LSD RS1.5WAY (1 & 1.5) Front Differential for GC8 GDA Subaru Impreza BR9 BM9 1993-2007

Cusco LSD RS1.5WAY front limited slip differential installs directly into Subaru Impreza GC8 and GDA chassis with BR9 BM9 front differentials. Built for WRX STI and WRX models it provides full lock during acceleration for maximum power to both wheels. Partial lock on deceleration keeps stability in corners for road or track driving.

Key Features

  • 1.5 Way Action: Full lock under acceleration transfers torque instantly partial lock on deceleration prevents inside wheel spin
  • Clutch Pack Design: 6 clutch plates per side deliver consistent grip under high load conditions
  • WPC Processed Gears: Shot peened bevel gears cut wear by 30% and lower operating temperatures for long service life
  • Fixed Preload Setting: Factory set initial torque at 55-65% ensures predictable response without adjustments
  • Made in Japan: Forged internals handle 500+hp builds with direct OEM replacement fit

Product Notes

  • Pair with Cusco LSD oil Type-RS for clutch protection and smooth operation
  • Perform 30 minute break-in at 50% throttle after install
  • Heavy item ships freight or UPS oversized rate applies

Installation Notes

  • Professional installation recommended.
  • Remove front differential drain fluid and replace crush washers
  • Bolts directly to OEM carrier case no modifications needed

This Part Fits

Year Make Model Submodel
2004-2007 Subaru Impreza WRX STI
2007 Subaru Impreza WRX STI Limited
2006-2007 Subaru Impreza WRX TR
2006-2007 Subaru Impreza 2.5i
2001 Subaru Impreza L
2001-2004 Subaru Impreza Outback
2005-2007 Subaru Impreza Outback Sport
2001-2005 Subaru Impreza RS
2002-2004 Subaru Impreza TS
2002-2007 Subaru Impreza WRX
2006-2007 Subaru Impreza WRX Limited
1993-2000 Subaru Impreza GC8 WRX STI
2002-2007 Subaru Impreza GDA STI BR9 BM9

Why Choose Cusco?

  • Motorsport pedigree from rally and drift championships
  • Direct fit engineering from OEM supplier standards
  • Components tested to 100000km durability

Frequently Asked Questions

  • Q: Will this fit 2004-2007 USDM WRX STI?
    A: Yes LSD 180 C15 bolts into BR9 front diff housing on 2004-2007 STI models
  • Q: What gear oil works best?
    A: Use Cusco LSD oil Type-RS 75W-140 synthetic 1.1 quarts fills front diff
  • Q: Is professional install required?
    A: Recommended due to axle shaft alignment and preload shimming during assembly

Shipping & Handling

  • Method: UPS Ground or Freight for heavy item
  • Availability: In stock - ships same or next business day
  • Packaging: Double wall carton 14 x 14 x 10 inches
  • Weight: 25 lbs

Request For Information

Have questions about Cusco LSD RS1.5WAY (1 & 1.5) Front For GC8 GDA Impreza BR9 BM9? Fill out the form below and we'll get back to you by the next business day.
Cusco

Cusco

Cusco parts and accessories for Japanese sport compact and all wheel drive platforms are stocked at Black Ops Auto Works. Shop coilovers, strut tower braces, chassis bracing, limited slip differentials, sway bars, bushings, control arms, and roll cage components for the Subaru WRX and STI, Toyota 86 and GR86, Mazda Miata, Honda Civic and S2000, Mitsubishi Evo, and Nissan Skyline and GT-R platforms. Every product is filterable by year, make, model, trim, and engine so the correct part ships the first time. Black Ops Auto Works carries 429 Cusco SKUs across suspension, chassis reinforcement, drivetrain, and interior categories. What This Brand Covers Cusco is a Japanese performance parts manufacturer with over 40 years of motorsports experience, engineering coilovers, chassis braces, differentials, and suspension components for Japanese domestic market race cars and street performance builds. The catalog is built around sport compact and all wheel drive platforms where precise cha...

View Cusco Products
Differentials

Differentials

Performance differentials, limited-slip differentials, locking differentials, and traction upgrades are stocked at Black Ops Auto Works. Shop clutch-type LSDs, helical gear LSDs, automatic lockers, selectable air lockers, electronic lockers, spool-style race components, differential carriers, truck and Jeep lockers, import performance LSDs, and axle-specific units for Subaru WRX and STI, Nissan Z and Skyline, BMW M, Mazda Miata, Porsche, Ford 8.8, Dana axles, GM trucks, Ram trucks, and off-road builds. Every product is filterable by year, make, model, trim, engine, and drivetrain so the correct part ships the first time. Black Ops Auto Works carries 235 differential SKUs across limited-slip designs, locking systems, axle spline counts, carrier cases, street and track traction upgrades, off-road configurations, and drivetrain-specific fitment. What This Differential Collection Covers A differential splits torque between driven wheels while allowing different wheel speeds through ...

View Differentials Products
Differentials & Components

Differentials & Components

Differentials and components at Black Ops Auto Works include diff braces, diff covers, rebuild and overhaul kits, differential bushings and mounts, limited-slip differentials, yokes, and final drive gears built for street, towing, off-road, and racing applications. Black Ops Auto Works carries 1,332 drivetrain SKUs from Yukon Gear and Axle, ARB, OS Giken, SuperPro, and Per4mance Development, spanning Hellcat and Trackhawk platforms, trucks, Jeep Wrangler, and sport compacts. What This Collection Covers This collection combines fifteen related differential and drivetrain categories, including diff braces, diff covers and gaskets, rebuild and overhaul kits, install kits, seal kits, bushings, mounts, housings, dropouts, spider gears, yokes, complete differentials, and final drive gears. Product Types in This Collection Shoppers will find billet differential braces for high-horsepower RWD platforms, nodular iron and aluminum diff covers, master overhaul kits, differential-to-cradle ...

View Differentials & Components Products
Drivetrain

Drivetrain

Drivetrain parts for high-horsepower Mopar, truck, Jeep, and import platforms are stocked at Black Ops Auto Works. Shop differentials, axles, driveshafts, clutch kits, flywheels, flexplates, shifters, transmission components, ring and pinion gears, differential braces, and driveline hardware for Hellcat, Trackhawk, TRX, HEMI, LS, LT, Coyote, and turbocharged import platforms. Every drivetrain part is filterable by vehicle platform, drivetrain layout, transmission type, and power level so the correct part ships the first time. Black Ops Auto Works carries 4,765 drivetrain SKUs across differentials, axles, clutches, and transmission hardware. What This Category Covers The drivetrain transfers power from the engine to the wheels and includes the transmission, clutch, driveshafts, axles, differentials, ring and pinion gears, wheel hubs, wheel bearings, U-joints, shifters, mounts, and bushings. Upgrading these components improves power delivery, durability, and reliability under incr...

View Drivetrain Products
Military & First Responder Discounts

Military & First Responder Discount Program

Black Ops Auto Works proudly honors active duty military, veterans, National Guard, reserves, police officers, firefighters, and EMTs with an exclusive 5% discount on all performance parts and carbon fiber upgrades. Verify instantly and start saving today.

Learn More & Apply

Your cart

×