QA1 R253-175 Rear Coil-Over Conversion System for 68-70 Mopar B-Body 8 Ohm" Housin

Vehicle Fitment

• 1968-1970 Mopar B-Body (Dodge Charger/Coronet, Plymouth Belvedere) - rear axle conversion kit for 8 ¾" housing.

Features

• Triangulated 4-link coil-over conversion system replacing factory leaf springs
• Double-adjustable coil-over shocks with independent compression & rebound tuning
• 175 lb/in coil spring rate included in kit
• Corrects wheelbase and allows larger wheel/tire fitment for modern stance and performance
• Works with Mopar 8 ¾" and Ford 9" rear axle housings
• Powder-coated tubular crossmember, upper & lower trailing arms for enhanced rigidity
• Designed to support 3" bumper-exit exhaust clearance under the axle housing
• Made in the USA with QA1's lifetime-eligible shock warranty on applicable components

Specifications

• Position: Rear axle conversion (kit replaces leaf springs with 4-link + coil-over)
• Spring rate: 175 lb/in
• Shock type: Double-adjustable coil-over (compression & rebound) with adjustable ride height
• Axle housing compatibility: Mopar 8 ¾" or Ford 9" (user must verify housing)
• Installation: Requires frame rail crossmember weld and axle housing tab welds - moderate fabrication required
• Clearance: Supports 3" bumper-exit exhaust layout as shipped

Included Components

• 1x QA1 R253-175 complete rear 4-link coil-over conversion kit
• 2x Double-adjustable coil-over shock assemblies (left & right)
• 2x Upper trailing arms (left & right)
• 2x Lower trailing arms (left & right)
• 1x Tubular crossmember for frame rail installation
• Hardware pack (mounting bolts, spacers, bushings, washers)
• Installation instructions guide

Product Description

The QA1 R253-175 Rear Coil-Over Conversion System is engineered to dramatically upgrade the handling, stance and adaptability of your classic 1968-1970 Mopar B-Body (Dodge Charger/Coronet, Plymouth Belvedere) by replacing the factory leaf spring rear suspension with a modern, triangulated 4-link coil-over setup. With included 175 lb/in springs and double-adjustable coil-over shocks, the system allows both ride height tuning and damping control independent of each other - delivering superior road, track or show performance.

Built with powder-coated tubular components including the crossmember, upper/lower trailing arms and hardware, the R253-175 kit offers robust durability, improved axle control, and clearance for larger wheels/tires and 3" bumper-exit exhaust systems. Note: this is a conversion kit that requires welding of the crossmember to the frame rails and tabs to the axle housing. It is compatible with Mopar 8 ¾" or Ford 9" rear housings - verify your vehicle's housing before purchase.

Ideal for enthusiasts restoring or building a modern performance version of the 68-70 B-Body Mopar, this QA1 R253-175 kit transforms your rear suspension into one that not only looks purpose-built but handles with precision at street, autocross or drag levels. Ensure your vehicle matches the fitment criteria (68-70 B-Body, correct axle housing) before ordering to avoid mis-fitment.