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QA1 10HTSF650 Pro Coilover Spring 10 Inch 650 lb/in Tapered High Travel

(Pontiac GTO 1968-72, Grand Prix 1969-72, LeMans 1968-72, Tempest 1968-70; Chevrolet Chevelle 1968-72, El Camino 1968-72, Monte Carlo 1970-72 + 6 more models)

Manufacturer

Picture for manufacturer QA1 Precision Products

Part Number

10HTSF650
10 reviews
Sale Price

$104.95

In Stock (10+)

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Usually delivered within 2 days

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Fitment guaranteed

Fitment guaranteed

Product Details

The QA1 10HTSF650 is a high-performance Pro Coilover spring engineered for immediate response, increased stability, and enhanced cornering abilities. This tapered high travel spring features a 650 lb/in spring rate with a 10-inch free length, designed specifically for use with QA1 Pro Coil GD, GR, GS, and MG coilover systems.

Key Specifications:

  • Spring rate: 650 lbs/in (linear rate)
  • Free length: 10 inches
  • Inside diameter: Tapered design - 2.50 inches (lower) to 3.50 inches (upper)
  • End style: Flat ground ends on both sides
  • Construction: High-tensile chrome silicon (CrS) alloy wire
  • Finish: Durable silver powdercoat

High Travel Design Benefits:

  • Fewer coils and smaller wire diameter reduce unsprung weight
  • Increased travel distance between coils for better suspension movement
  • Faster spring reaction for optimized suspension performance
  • Can compress to coil-bind without affecting spring rate or free height

Quality Features:

  • Cold wound, heat-treated, and shot peened for consistency and durability
  • Clearly marked with free length and spring rate for easy identification
  • Ground flat ends ensure straight, consistent operation
  • Made in the USA
  • Lifetime guarantee to remain within 2% of original free height and spring rate under normal operating conditions

This spring is specifically designed for Pro Coil applications and is not a direct OE replacement. Compatible only with vehicles utilizing QA1 Pro Coil Systems.

Products specifications

Fits

Pontiac GTO 1968-72, Grand Prix 1969-72, LeMans 1968-72, Tempest 1968-70; Chevrolet Chevelle 1968-72, El Camino 1968-72, Monte Carlo 1970-72; Oldsmobile Cutlass Supreme 1968-72, Cutlass 1968-72, 442 1968-71, Vista Cruiser 1968-72 + 3 more models

Title

QA1 Coil Spring 10HTSF650

Prop 65

WARNING: Cancer and Reproductive Harm. www.P65Warnings.ca.gov

There prices are the best I have seen for what I bought.

Excellent Service. Fast service. Very fast delivery and item was exactly as advertised.

Easy to use

Easy...fast...loved it

Although you should receive a 2 star review, I give it 5 stars only because I should have checked out with paypal before and because of your excellent customer service. Fix the glitch in your system so orders can actually be processed on your page instead

Best prison the Internet and quick order fulfillment. Glad to have found Autoplicity!

great price for this product. Just what I was looking for. thank you I will shop here again.

Wanted to buy my parts on another audtion site but found the price much better on Autoplicity, and the service seems friendly.

so far...so good

Great prices and great communication!!

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