Specifications
- Brand
- UMI Performance
- Part #
- 301519-R
- UPC
- 301519-R

UMI Performance 78-88 GM G-Body 12-Bolt Swap Upper and Lower Control Arm Kit
$565.75
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UMI Performance 78-88 GM G-Body 12-Bolt Swap Upper and Lower Control Arm Kit. Essential for swapping an A-Body rear end into your G-Body.
Key Features
- Fits 1978-1988 Buick Regal, Chevrolet Malibu, Chevrolet Monte Carlo, Oldsmobile Cutlass, Pontiac Grand Prix, and Pontiac LeMans.
- Designed to bolt a 1964-1972 GM A-Body rear end into a 1978-1988 GM G-Body chassis.
- Upper control arms are specifically shaped to correctly attach to the G-Body chassis and A-Body rear end mounting points.
- Helps prevent rear end bind, incorrect driveline angles, traction loss, vibrations, and unsafe handling.
- Fixed length lower control arms help center the rear end in the wheel wells.
- Lower control arms are equipped with grease-able polyurethane bushings for easier maintenance.
⚠️ CA WARNING: This product can expose you to chemicals known to the State of California to cause cancer and/or birth defects or other reproductive harm. Learn more
Product Details
If you're looking to swap a 1964-1972 GM A-Body 10-bolt or 12-bolt rear end into your 1978-1988 GM G-Body, like a Monte Carlo, Malibu, El Camino, Regal, Grand National, Grand Prix, or Cutlass, this UMI Performance control arm kit is what you need. These aren't just any control arms; they're specifically engineered to connect the G-Body chassis to the A-Body rear end's mounting points, ensuring everything lines up correctly for a successful installation. Using factory control arms for this kind of swap can lead to serious issues like rear end bind, incorrect driveline angles, loss of traction, unwanted vibrations, and compromised handling, which is why a dedicated kit like this is so important.
The upper control arms in this kit are designed to properly attach to both the G-Body chassis and the A-Body rear end, preventing the binding and driveline angle problems that can plague DIY swaps. The lower control arms are built to a fixed length, which helps to accurately center the rear end within the G-Body's wheel wells. For improved performance and longevity, the lower arms feature grease-able polyurethane bushings, allowing for easy maintenance and smoother operation. Additionally, the reinforced sway bar mounting holes add extra durability where it counts, ensuring your suspension components hold up under stress.
This kit includes both the upper and lower rear control arms, providing a complete solution for your rear end swap. By addressing the critical connection points and using well-built components, this kit helps ensure your G-Body handles predictably and safely after the swap, making it a solid choice for enthusiasts undertaking this popular modification.
Specifications
- Brand
- UMI Performance
- Manufacturer Part #
- 301519-R
- UPC
- 301519-R
Frequently Asked Questions
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UMI Performance 78-88 GM G-Body 12-Bolt Swap Upper and Lower Control Arm Kit
