QA1 ALN4000K-1 Pro-Rear Coilover Conversion Kit 3.25" Aluma Matic Non-Adjustable 12-175/350

The QA1 ALN4000K-1 is a bolt-in rear coilover conversion kit designed to upgrade your vehicle's suspension with a professional-grade, non-adjustable coilover setup. Built around QA1's Aluma Matic shock technology, this kit delivers a refined ride quality and improved handling in a durable, lightweight aluminum-bodied package.

This kit features a 3.25-inch diameter coilover body and is paired with dual-rate springs rated at 175/350 lbs/in on a 12-inch spring, providing progressive spring action that balances daily drivability with performance handling. The non-adjustable valving is factory-set for a consistent, reliable performance tune right out of the box.

Key Features:

• Bolt-in rear coilover conversion — no cutting or welding required
• USA-made mounting brackets included with all necessary hardware
• Aluma Matic aluminum-bodied shock absorbers for reduced unsprung weight
• Non-adjustable valving for a reliable, pre-tuned performance setup
• 3.25" coilover body diameter for increased spring and shock capacity
• Dual-rate 12" springs rated 175/350 lbs/in for progressive ride quality
• Kit includes five (5) coilover units with mounting brackets and hardware

QA1's rear coilover conversion kits are engineered and assembled in the USA, making them a trusted choice for enthusiasts and racers looking to modernize their suspension system without extensive fabrication work.