QA1 US402 Ultra Ride Rebound Adjustable Coilover Shock 10.125-14in Eye/Eye Rod

Vehicle Fitment

• Semi-Universal - no direct OEM vehicle fitment assigned
• Designed for street rods, hot rods, Pro Street, and custom builds requiring a coil-over shock with ride height adjustability
• Verify collapsed and extended lengths, body diameter, and mount dimensions against your application before ordering

Fitment Notes

• Upper and lower mounts are both eyelet/bushing style - confirm compatibility with your shock mounting locations
• Recommended spring: 2.5 in. I.D., 9-10 in. length (spring sold separately)
• Recommended ride height: approximately 11.5 in.
• Compatible with QA1 wireless remote controller for on-the-fly rebound adjustment
• Sold individually - one shock per unit

Features

• 18-position rebound adjustment with a comfortable fixed compression setting - ideal for street rod ride quality tuning
• Fully threaded aluminum body allows for precise ride height adjustment without shims or spacers
• Deflective-disc valving for consistent, responsive damping performance
• Lightweight billet aluminum body with clear-anodize finish for durability and show-quality appearance
• 5/8 in. hard-chromed, centerless-ground piston rod for long-term durability and seal integrity
• Double-lip wiper seals minimize contamination and extend service life
• 100% dyno-tested and serialized; serviceable and rebuildable by QA1 authorized service centers

Specifications

• Extended Length: 14.000 in.
• Collapsed Length: 10.125 in.
• Body Diameter: 2.000 in.
• Piston Rod Diameter: 5/8 in.
• Upper Mount: Eyelet/Bushing
• Lower Mount: Eyelet/Bushing
• Adjustment Type: 18-position rebound (fixed compression)
• Recommended Spring Diameter: 2.5 in. I.D.
• Recommended Spring Length: 9-10 in.
• Body Construction: Threaded machined aluminum, clear-anodized
• Valving Type: Deflective-disc, twin-tube
• Warranty: QA1 Limited Lifetime

Included Components

• 1x QA1 US402 Ultra Ride Rebound Adjustable Coil-Over Shock
• 1x Chrome or zinc-plated mounting hardware

Product Description

The QA1 US402 is an Ultra Ride rebound adjustable coil-over shock designed for street rods, hot rods, and Pro Street custom builds where ride height adjustability and fine-tuned rebound control are priorities. With 18 positions of rebound adjustment and a comfortable fixed compression setting, it delivers the smooth, compliant ride quality that custom builders demand without the complexity of full double-adjustable tuning. The fully threaded aluminum body allows precise ride height setting without shims, and the clear-anodized finish provides a clean, show-quality appearance under any build.

As a semi-universal part, buyers must verify that the extended and collapsed lengths, eyelet mount dimensions, and body diameter are compatible with their specific application before ordering. Spring is sold separately - a 2.5 in. I.D., 9-10 in. length coil spring is recommended. The US402 is also remote-ready, compatible with QA1's wireless remote controller. It is rebuildable at QA1 authorized service centers and backed by QA1's Limited Lifetime Warranty.