QA1 10HTBF650 is a silver 10-inch tapered Pro Coil spring with a 650 lb/in rate for compatible QA1 Pro Coil systems. Confirm the exact manufacturer part number and all current specifications before ordering.
Key Features
- As a result, these springs are lighter and have increased travel due to the larger distance between the coils.
- These new high travel springs are silver powder coated and ground at both ends for straight, consistent and accurate operations.
- Lengths and Rates Marked, All QA1 springs are clearly marked with the free length of the spring and spring rate for quick and easy identification.
- Made in the USA, QA1's high travel springs are proudly made in the USA.
- Made in the USA, these 2" I.D. high travel springs are manufactured from specially designed high-tensile, chrome silicon alloy spring wire, which allows them to have fewer coils and a smaller wire diameter.
- In addition, this high-grade material, along with careful heat-treating and post-processing, allows for greatly improved fatigue life, and the coil design allows the springs to be compressed to coil-bind without affecting spring rate or free height.
Fitment
Select this component by exact part number, dimensions, engine or system architecture, and mating components. No broad year-make-model claim is used where the manufacturer does not publish one.
Specifications
| Brand | QA1 |
|---|---|
| Manufacturer Part Number | 10HTBF650 |
| Product Type | Coil Springs |
| Fitment Type | Fitment Verification Required |
| Condition | New |
| GTIN | 806990119698 |
What's Included
One new QA1 coil spring identified by manufacturer part number 10HTBF650 in the configuration shown. Hardware or companion parts are included only when expressly stated by the manufacturer.
About QA1
QA1 manufactures automotive performance and replacement parts identified by exact part number, specifications, and published application data.
Related QA1 Products
- Shop all QA1 products
- QA1 2-1/2in ID High Travel Spring - 10in Length x 150lbs/in - Silver Powder Coated
- QA1 2-1/2in ID High Travel Spring - 10in Length x 150lbs/in - Black Powder Coated
- QA1 2-1/2in ID High Travel Spring - 10in Length x 200lbs/in - Silver Powder Coated
Frequently Asked Questions
How do I confirm 10HTBF650 is correct?
Select this component by exact part number, dimensions, engine or system architecture, and mating components. No broad year-make-model claim is used where the manufacturer does not publish one.
Are similar-looking parts interchangeable?
No. Match part number 10HTBF650, dimensions, configuration, included components, and every current manufacturer note.
What is included with this listing?
One new QA1 coil spring identified by manufacturer part number 10HTBF650 in the configuration shown. Hardware or companion parts are included only when expressly stated by the manufacturer.
Installation
Follow the current QA1 instructions for part number 10HTBF650. Verify fit, clearance, system specifications, fastener torque, and safe operation before use. Professional installation is recommended when specialized tools, alignment, calibration, or fabrication are required.




