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- USA
- CAN
Ships within 48 hours · Estimated delivery Oct 5 - Oct 10
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For Your Every Summer RSVP, with Code: SUMMER15
Description
QA1 2-1/2in ID Spring - 10in Length x 300lbs/in - Chrome PlatedAvailable in a chrome plated or silver powder coated finished, QA1's 2. 5" I. D. Coil Springs are offered in 6" to 14" free length. QA1's springs are strong, consistent and have a long life because they are made with the highest quality materials. A lifetime guarantee ensures that all QA1 springs will stay within 2% of the original free height and rate under normal operating conditions. Chrome Silicon Steel (CrS), All QA1 springs are manufactured
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
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Best in 7 days
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Best in 7 days
4.8 ★★★★★
Based on 990 reviews
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Product Reviews
★★★★★ 5
Protección!
Exelente!
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Reviewed in the United States on May 22, 2026
★★★★★ 5
Recomendado
Si utilizas un 4.6L Stoker es obligatorio utilizar en cada cambio de aceite.
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Reviewed in the United States on May 30, 2026
★★★★★ 5
Hard to find.
Good stuff. Hard to find. It should extend my engine life.
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Reviewed in the United States on April 2, 2026
★★★★★ 4
Great product
Quick delivery.
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Reviewed in the United States on April 29, 2026
★★★★★ 5
Use as directed, when needed, and you'll be good to go.
A must have if you have a need for a ZDDP additive. This won't fix your worn valve seats, leaking piston rings, seasonal depression or gout but it will improve the lubricating properties of a quality oil in a properly maintained motor for your longevity goals.
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Reviewed in the United States on February 5, 2026
