Suspension and Components› Rear Suspension Components

QA1 Precision Products, Inc

QA1 64-66 Ford Mustang Rear Suspension Conversion System - Single Adj. 130lb/in

$2,949.47

SKU: Q00B R123-130

Special Order
Special Order
Ships in 4–6 weeks
Free Shipping
Non-Returnable Item
INSTALL DIFFICULTY
DIY PRO SHOP

Moderate — 2–4 hours

Description

This all-in-one system replaces stock leaf springs with a modern, geometry-correct, triangulated 4-link setup and includes a rugged QA1 9-inch rear housing. It features single-adjustable coilovers with 18 clicks of combined compression and rebound adjustment. The heavy-duty 9-inch housing features fully formed trailing-arm brackets, a fabricated steel center section, and robust 3-inch O.D. axle tubes, supporting up to 800 horsepower. It includes 31-spline alloy axles rated for 650 HP, Big Ford "New Style Torino" Brake Flanges, and a 5x4.5-inch wheel bolt pattern. The kit offers customizable ride height from stock down to 3 inches lower. It comes with weld-in, self-fixturing brackets for simplified installation and is proudly made in the USA.

Fitment

Fitment Guaranteed

Don’t gamble
on fit.

Log your build in the MOTORMIA app and we’ll guarantee this part fits your exact setup — or your money back, return shipping covered.

Available on iOS & Android

Specifications

BrandQA1 Precision Products, Inc
Part NumberQ00B R123-130

Buy with Confidence

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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