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Mustang II Bolt-On Coil-Over Kit w/ QA1 Shocks
Mustang II Bolt-On Coil-Over Kit w/ QA1 Shocks

Mustang II Bolt-On Coil-Over Kit w/ QA1 Shocks

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Mustang II Bolt-On Coil-Over Kit w/ QA1 Shocks
Mustang II Bolt-On Coil-Over Kit w/ QA1 Shocks
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Part # 2559000.GS
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  • Get FREE shipping when your order includes this item and exceeds $99! Ground shipping only in the contiguous US.

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You're almost there! This kit has an option or two for you to select. Let us know which options you want for your new kit.
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Replacement Springs for Mustang II Coilovers
Replacement Springs for Mustang II Coilovers
Quantity: 2
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These are garage sale priced because they were used. The springs with be brand new in box.

No Warranty, No Returns on Garage Sale Items    


These kits provide the highest quality performance characteristics for your Mustang II front end. The unique "half barrel" shape springs are designed specifically for use with the included coil-over shocks and the factory upper spring pocket. This enables the use of a longer spring, which allows for a lighter overall spring rate. By building the upper section of the spring to factory dimensions, this puts the weight back into the frame instead of on a single stud. 

  • For¬†stock-to-2" lowered¬†cars (no less)
  • Fixed, non-adjustable valving¬†
  • Developed for high performance with increased travel
  • Fully adjustable ride height using included aluminum spanner nut
  • Easy bolt-in installation
  • Unique spring fits the stock upper seat in the frame
  • Includes 2 chrome body shocks, mounting kit, 2 chrome-plated springs (choose specific rate)

NOTE: Not recommended for front axle weights in excess of 1900 lbs.

Spring Rate Chart (Link)


Coil-Over Mounting Guide (GIF)


  • Shock
    • Mounted Length: 10-5/8" to 11-1/4"¬†(upper shock stud to lower shock eye at ride height)
    • Lower control arm level or slightly higher at inner end¬†
  • Spring
    • Free Height: 8.125"
    • Small End: 2.5" I.D.
    • Large End: 3.5: I.D.
Some parts are not legal for use in California or other states with similar laws/regulations

What's In The Kit

Each kit from Speedway Motors is carefully packaged and delivered right to your door. Below is a list of all the items you should expect to receive when you order this kit. Some of these items may also be available for sale individually if you're here looking for replacement parts.
  • Shocks for Mustang II Coil-Over
    Qty x 2
  • QA1 Pin Cross 0.750" O.D.
    Qty x 2
  • Replacement Springs for Mustang II Coilovers
    Qty x 2

More Like This


Q & A

Videos & Articles
  • Check out this coil-over mounting guide to learn about determining your spring rate, compensating for mounted angle, and measuring a replacement shock accurately.
  • We add some tuneability to the suspension on Project Chevelle by bolting on QA1 coilovers front and rear.
  • Product guru Jeff K. takes us along as he updates the suspension on his 1946 Ford Sedan Delivery with a set of fresh Mustang II coilovers following an unfortunate incident with a pothole.

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