-13%
Sold out
QA1 78-96 GM B-Body Pro Rear Coil-Over System - Single Adj. - 12in x 300lbs/in - Aluminum - QA1 QAPRCK52385
Click to zoom in

QA1 78-96 GM B-Body Pro Rear Coil-Over System - Single Adj. - 12in x 300lbs/in - Aluminum

QA1
QAPRCK52385
806990147448
Coilovers
Out of stock
$ 1,026.91 $ 885.95

Build a properly matched suspension or steering setup with this QA1 coilovers. Manufacturer part number RCK52385 is offered in the listed 78-96 GM B-Body Pro Rear Coil-Over System - Single Adj. - 12in x 300lbs/in - Aluminum configuration, so vehicle application, mounting position, dimensions, spring rate, adjustment range, and all notes must be confirmed before ordering.

Key Features

  • 300 lb/in High-Travel Springs: Medium rate optimized for most street and performance B-Body builds.
  • Single Adjustable Shocks: 18 positions of simultaneous rebound & compression adjustment.
  • 12" Spring Length: Ideal for lowered applications with excellent travel.
  • Fully Threaded Aluminum Body: Easy ride height adjustment from 2.5" to 5.5" drop.
  • Pair of 12" x 300 lb/in High-Travel Springs.
  • Lightweight & Durable: Reduces unsprung weight while maintaining strength.

Fitment

Years Make Model Submodel or Application
1978-1983 Buick Estate Wagon All listed configurations unless otherwise noted
1978-1981 Buick LeSabre All listed configurations unless otherwise noted
1985 Buick LeSabre Collector's Edition
1978 Buick LeSabre Custom
1982-1985 Buick LeSabre Custom
1985 Buick LeSabre Estate Wagon
1979-1985 Buick LeSabre Limited
1982 Buick LeSabre Limited Edition F/E
1978-1981 Buick LeSabre Sport
1992-1995 Buick Roadmaster All listed configurations unless otherwise noted
1996 Buick Roadmaster Collector's Edition
1991-1995 Buick Roadmaster Estate Wagon
1996 Buick Roadmaster Estate Wagon Collector's Edition
1992-1995 Buick Roadmaster Limited
1996 Buick Roadmaster Limited Collector's Edition
1986-1992 Chevrolet Caprice All listed configurations unless otherwise noted
1978-1996 Chevrolet Caprice Classic
1986-1990 Chevrolet Caprice Classic Brougham
1978 Chevrolet Caprice Classic Estate
1981-1982 Chevrolet Caprice Classic Estate
1978-1981 Chevrolet Caprice Classic Landau
1993-1994 Chevrolet Caprice Classic LS
1987-1990 Chevrolet Caprice Classic LS Brougham
1991-1993 Chevrolet Caprice Classic LTZ
1979-1980 Chevrolet Caprice Classic Sport
1978-1985 Chevrolet Impala All listed configurations unless otherwise noted
1981-1982 Chevrolet Impala Estate
1978-1979 Chevrolet Impala Landau
1979-1980 Chevrolet Impala Sport
1994-1996 Chevrolet Impala SS
1978-1992 Oldsmobile Custom Cruiser All listed configurations unless otherwise noted
1978-1983 Oldsmobile Delta 88 All listed configurations unless otherwise noted
1980-1981 Oldsmobile Delta 88 Holiday
1978-1985 Oldsmobile Delta 88 Royale
1980-1985 Oldsmobile Delta 88 Royale Brougham
1984-1985 Oldsmobile Delta 88 Royale Brougham LS
1978-1981 Pontiac Bonneville All listed configurations unless otherwise noted
1978-1981 Pontiac Bonneville Brougham
1978-1981 Pontiac Bonneville Safari
1978-1981 Pontiac Catalina All listed configurations unless otherwise noted
1978-1981 Pontiac Catalina Safari
1983-1986 Pontiac Parisienne All listed configurations unless otherwise noted
1983-1986 Pontiac Parisienne Brougham
1987-1989 Pontiac Safari All listed configurations unless otherwise noted

Confirm chassis configuration, suspension position, drivetrain clearance, brake package, wheel and tire clearance, and every current QA1 application note.

Specifications

Brand QA1
Manufacturer Part Number RCK52385
Product Type Coilovers
Listed Configuration 78-96 GM B-Body Pro Rear Coil-Over System - Single Adj. - 12in x 300lbs/in - Aluminum
Compatibility Basis Vehicle Specific
Condition New

What's Included

One new QA1 coilovers identified by manufacturer part number RCK52385, with only the components and hardware supplied by QA1 for that exact part number.

About QA1

QA1 develops suspension, steering, driveline, rod-end, bearing, spring, and chassis components for street, performance, racing, restoration, and custom vehicle applications.

Related QA1 Products

Frequently Asked Questions

Will QA1 RCK52385 fit my 1978-1983 Buick Estate Wagon?
Match the complete fitment row, then verify mounting position, suspension configuration, drivetrain clearance, brake package, wheel and tire clearance, and every current QA1 note.

What measurements matter when ordering QA1 RCK52385?
Verify the dimensions and interfaces named in this listing, including thread size and direction, extended and compressed length, bore, spring dimensions or rate, mounting style, and available clearance as applicable.

Does QA1 RCK52385 require setup after installation?
Suspension and steering work commonly requires torque verification, clearance and travel checks, ride-height or damping setup when adjustable, and a professional alignment before road use.

Installation

Follow the current QA1 instructions for this exact part number. Support the vehicle safely, compare every component before disassembly, use the specified hardware and torque values, verify thread engagement and mounting orientation, cycle the suspension through its operating range, check brake and wheel clearance, and complete an alignment when the installation changes suspension or steering geometry.

Request For Information

Have questions about QA1 78-96 GM B-Body Pro Rear Coil-Over System - Single Adj. - 12in x 300lbs/in - Aluminum? Fill out the form below and we'll get back to you by the next business day.
Coilovers

Coilovers

Coilovers from KW Suspension, Bilstein, FOX, ICON Vehicle Dynamics, Ohlins, Silver's NEOMAX, BC Racing, Fortune Auto, Ridetech, QA1, H&R, and Eibach are stocked at Black Ops Auto Works for street cars, track cars, off-road trucks, lift-application SUVs, and classic muscle car conversions. Every product is filterable by year, make, model, trim, and drivetrain so the correct coilover kit ships the first time. Black Ops Auto Works carries 1,646 coilover SKUs across non-adjustable, single-adjustable, double-adjustable, and remote-reservoir categories. What This Collection Covers A coilover combines a shock absorber and coil spring into a single adjustable unit with a threaded body for ride height adjustment. Coilovers offer purpose matched spring rates and damper valving that a lowering spring on a factory shock cannot replicate. Product Categories Non-adjustable coilovers, single-adjustable coilovers, double-adjustable coilovers, remote-reservoir coilovers, off-road lift coilov...

View Coilovers Products
Coilovers & Components

Coilovers & Components

Coilovers and coilover components are stocked at Black Ops Auto Works for trucks, SUVs, muscle cars, and street performance builds. Shop complete coilover kits, coilover springs, lowering springs, shock boots, dampening adjustment extenders, and suspension hardware for Ford, Toyota, Chevrolet, Jeep, Dodge, and Porsche platforms. Every product is filterable by year, make, model, trim, and drivetrain so the correct coilover setup ships the first time. Black Ops Auto Works carries 2,259 coilover and component SKUs across street, off-road, and track categories. What This Collection Covers Coilovers combine a coil spring and a shock absorber into a single adjustable unit, giving control over ride height and, on many models, damping stiffness. This collection also includes the individual components used to service, upgrade, or protect an existing coilover system. Product Categories Complete coilover kits, individual coilover shocks, coilover springs, lowering springs, protective shock...

View Coilovers & Components Products
QA1

QA1

Shop QA1 coilovers, shocks, springs, control arms, sway bars, suspension systems, rod ends, bearings, steering components, and chassis hardware by exact part number and verified compatibility. Choosing the Correct QA1 Product Match the complete year, make, model, suspension configuration, and mounting position when vehicle fitment is listed Verify dimensions, thread size and direction, bore, travel, spring rate, load, and mounting style for interface-based components Confirm drivetrain, brake, wheel, tire, exhaust, and chassis clearance before ordering Review the current QA1 application data and installation instructions for the exact part number Related QA1 Products All QA1 Products QA1 High Travel Coilover Spring QA1 C Series Rod End QA1 Proma Star Coilover Shock Frequently Asked Questions How do I confirm a QA1 product fits my vehicle?Match the listed year, make, model, and submodel, then verify suspension configuration, mounting position, dimensions, drivetrain clearance, b...

View QA1 Products
Suspension

Suspension

Suspension parts and complete kits for cars, trucks, SUVs, Jeeps, and off-road builds are stocked at Black Ops Auto Works. Shop coilovers, lowering springs, lift kits, leveling kits, shocks and struts, sway bars, control arms, tie rods, ball joints, bushings, chassis bracing, alignment hardware, air suspension, and complete stage kits from Bilstein, KW, Ohlins, Fox, KING, ICON, BC Racing, Silvers, Eibach, H&R, Swift Springs, Whiteline, Energy Suspension, Moog, SPC Performance, Rough Country, ReadyLIFT, BDS, Skyjacker, Air Lift, Firestone, and Black Ops Auto Works. Start with a matched shock and spring package or a full coilover kit, then layer in sway bars, chassis bracing, and camber adjustment hardware. Every part is filterable by year, make, model, trim, and drivetrain to confirm fitment before ordering. What This Category Covers Suspension is the highest-leverage handling upgrade on any vehicle. A properly matched shock, spring, and sway bar package produces measurable i...

View Suspension 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

×