Size Chart
×
QA1 part number MK03 is a stud-top bushing kit including jam nuts, sized for 5/8in and 7/8in hole bushings.
This is a universal suspension hardware kit sized by bushing hole diameter rather than a specific vehicle; confirm the mating stud and housing bore before ordering.
| Years | Make | Model | Notes |
|---|---|---|---|
| n.a. | n.a. | n.a. | Universal chassis hardware component. |
Universal; confirm mounting dimensions against the application before ordering.
| Detail | Value |
|---|---|
| Brand | QA1 |
| Bushing hole sizes | 5/8in and 7/8in |
| Hardware included | Jam nuts |
QA1 manufactures suspension and chassis hardware to defined dimensional specifications, letting builders match components by size and thread rather than by a single vehicle-specific part number.
5/8in and 7/8in.
Are jam nuts included?Yes, per QA1's stated kit contents.
What mounting style is this kit for?Stud-top mounting.
Is this kit vehicle-specific?No. It is a universal suspension hardware kit sized by bushing hole diameter; confirm the mating stud and housing bore before ordering.
Can this kit be used on both shocks and coilovers?Confirm the specific stud-top mount design matches this kit's bushing sizes before use on either application.
Does this kit include the mounting stud itself?QA1's stated contents cover the bushings and jam nuts; the stud is part of the shock or coilover being mounted.
What material are the bushings made from?Not specified for this exact part number in the sourced listing.
Can the two bushing sizes be used interchangeably?No, each is sized for a different mount hole diameter; use the one matching the specific mount.
QA1 does not publish a vehicle-specific installation procedure or torque value for this hardware; use the mount manufacturer's specification.
Polyurethane and rubber bushing kits are stocked at Black Ops Auto Works for control arms, sway bars, motor mounts, and rack and pinion mounts across trucks, SUVs, sport compacts, and classic muscle cars. Shop control arm bushing kits, master suspension sets, motor mount inserts, and steering rack bushings for Toyota, Lexus, Ford, Chevrolet, Honda, Subaru, Dodge, BMW, Mazda, and Jeep platforms. Every product is filterable by year, make, model, trim, and drivetrain so the correct bushing kit ships the first time. Black Ops Auto Works carries 2,625 bushing kit SKUs from leading suspension brands. What This Collection Covers Bushing kits replace worn rubber or upgrade to firmer polyurethane at critical suspension and drivetrain pivot points, tightening handling response and eliminating clunks and play caused by degraded factory rubber. Kit Categories Control arm bushing kits, master suspension bushing sets, motor and transmission mount inserts, sway bar and end link bushings, steer...
View Bushing Kits Products
Shop suspension bushings, bushing kits, and full vehicle bushing kits from Energy Suspension, Prothane, Whiteline, Powerflex, SuperPro, Daystar, Moog, Mevotech, Nolathane, PST, Rare Parts, Whiteline KCA, and Black Ops Auto Works. Find polyurethane bushings, spherical bushings, replacement rubber bushings, control arm bushings, sway bar bushings, differential bushings, subframe bushings, transmission mount bushings, engine mount inserts, body mount bushings, and complete vehicle bushing kits for cars, trucks, SUVs, Jeeps, and off-road builds. Replace worn factory rubber bushings with polyurethane or spherical bushings to reduce deflection, sharpen handling, and extend service life. Shop by vehicle year, make, model, trim, subassembly (control arm, sway bar, differential, subframe), and material (polyurethane, spherical, replacement rubber). Suspension bushings are the small polyurethane, rubber, or spherical inserts that isolate suspension components from the chassis and from eac...
View Bushings Products
QA1 suspension parts are stocked at Black Ops Auto Works for American muscle cars and classic trucks. Shop coilover kits, shock absorbers, springs, handling kits, four link systems, sway bars, strut kits, rod ends, and suspension hardware for the Mustang, Camaro, Corvette, Challenger, Charger, and GM B-Body, F-Body, and G-Body platforms. Every product is filterable by year, make, model, trim, and drivetrain so the correct part ships the first time. Black Ops Auto Works carries 536 QA1 SKUs across coilovers, shocks, springs, and handling kit categories. What This Brand Covers QA1 is a suspension manufacturer known for adjustable coilover systems, shock absorbers, and complete handling kits built for muscle cars, classic trucks, drag cars, and pro touring builds. The lineup covers everything from single component shock replacement to full vehicle handling packages. Brand Focus QA1 concentrates on American muscle car and classic truck platforms, with deep coverage of GM, Ford, and ...
View QA1 Products
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