SKU: 10HT400 | UPC: 806990112781
QA1 2-1/2in ID High Travel Spring – 10in Length x 400lbs/in – Silver Powder Coated
QA1 10HT400 delivers a high travel coil spring designed for coilover suspensions in racing, drag racing, street performance and street rodding applications. This 2-1/2 inch inner diameter spring measures 10 inches in free length with a 400 lb/in rate, crafted from chrome silicon alloy for reduced weight and extended travel. It drops unsprung mass, improves suspension response and handles coil bind without rate loss or height change.
Key Features
- Chrome Silicon Construction: High-tensile alloy wire enables fewer coils, smaller diameter and lighter weight while boosting fatigue life through heat treatment, shot peening and post-processing.
- Increased Travel Design: Larger spacing between coils provides more suspension travel, quicker reaction times and optimized performance in high-demand setups.
- Silver Powder Coat Finish: Durable coating resists corrosion and ensures long-lasting appearance under racing conditions.
- Ground and Squared Ends: Precision grinding at both ends delivers straight, consistent seating and accurate operation in coilover assemblies.
- Marked Specifications: Clearly labeled free length and rate for fast identification during installs or inventory.
Product Notes
- Compresses to coil bind without impacting spring rate or free height.
- Lifetime guarantee keeps free height and rate within 2% under normal use.
- Special order item, verify stock before purchase.
Installation Notes
- Professional installation recommended.
- Requires 2.5in ID coilover body or compatible strut insert.
- Use factory or QA1 hardware for secure mounting. torque to spec.
This Part Fits
| Year | Make | Model | Submodel |
|---|---|---|---|
| Universal | – | Coilover Applications | Racing/Drag/Street Performance |
Why Choose QA1?
- Over 30 years leading rod ends, bearings and suspension for motorsports.
- 83,000 sq ft USA facility manufactures consistent, durable components.
- Innovates with carbon fiber driveshafts and high-performance springs.
Frequently Asked Questions
- Q: What applications does the QA1 10HT400 fit?
A: Universal for 2.5in ID coilovers in circle track, drag racing, street performance and rodding vehicles. - Q: What material and finish are used?
A: Chrome silicon steel, cold wound, heat treated, shot peened with silver powder coat for strength and corrosion resistance. - Q: What is the warranty coverage?
A: Lifetime guarantee to hold within 2% of original free height and rate under normal operating conditions.
Shipping & Handling
- Method: UPS Ground
- Availability: In stock – ships same or next business day
- Packaging: Protective box, 12in x 4in x 4in
- Weight: 5.3 lbs
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