QA1 GM Pro Front Coil-Over System – Single Adj. – 10in x 500lbs/in – Pigtail – Aluminum

SKU: GS401-10500A | UPC: 806990062031

QA1 GM Pro Front Coil-Over System – Single Adj. – 10in x 500lbs/in – Pigtail – Aluminum for 1955-1957 Chevrolet

Upgrade your 1955-1957 Chevrolet passenger car with the QA1 GS401-10500A Pro Front Coil-Over System sold as a pair. This single adjustable setup delivers precise valving control and ride height tuning via fully threaded aluminum bodies. High travel springs and lightweight design improve handling in drag racing, street performance, autocross and road racing.

Key Features

• Single Adjustable Valving: Tune compression and rebound simultaneously to match your driving style from street to track.
• Lightweight Aluminum Body: Reduces unsprung weight for quicker response and better suspension performance, 20.63in extended, 10.63in compressed, 10in travel.
• High Travel Springs: 10in tall 500lbs/in chrome silicon steel pigtail springs with fewer coils for increased travel and faster reaction.
• Ride Height Adjustable: Fully threaded body allows precise stance and weight balance adjustments without disassembly.
• Bolt-In Design: Direct fit for 55-57 Chevy factory control arms, 100% dyno tested, serialized, serviceable by QA1 centers, made in USA.

Product Notes

• Sold as a pair for complete front suspension upgrade.
• Rebuildable at QA1 authorized service centers for long-term durability.
• Package weight 20 lbs, ships in protective box measuring 26in x 14in x 14in.

Installation Notes

• Professional installation recommended.
• Bolts directly to OEM upper and lower control arms, no welding required.
• Stud upper mount and pigtail lower end, verify shock length matches factory geometry.

This Part Fits

Year	Make	Model	Submodel
1955	Chevrolet	150 Series	All
1955	Chevrolet	210 Series	All
1955	Chevrolet	Bel Air	All
1956	Chevrolet	150 Series	All
1956	Chevrolet	210 Series	All
1956	Chevrolet	Bel Air	All
1957	Chevrolet	150 Series	All
1957	Chevrolet	210 Series	All
1957	Chevrolet	Bel Air	All

Why Choose QA1?

• Proven in drag racing, road racing and street rod applications nationwide.
• Every shock dyno tested and serialized for consistent quality.
• Engineered in USA with rebuildable design for racing reliability.

Frequently Asked Questions

• Q: Does this fit 1955-1957 Chevrolet trucks?
  A: Designed for passenger cars including 150, 210 and Bel Air series, confirm suspension geometry for trucks.
• Q: What material are the shocks and springs?
  A: Billet aluminum shock bodies with chrome silicon high travel springs for lightweight strength.
• Q: What warranty coverage applies?
  A: QA1 offers limited lifetime warranty on valving, full details on qa1.net.

Shipping & Handling

• Method: UPS Ground or FedEx
• Availability: In stock – ships same or next business day
• Packaging: Secure pair box 26in x 14in x 14in
• Weight: 20 lbs