QA1 Coil Spring 2.5in x 9 550# (9HT550) eBay 8 Inch QA1 Coilover Chrome Silicon Racing Spring 2.5 ID 375 lb QA1 Coil Spring Coil Over 4.125 ID 11.000 Length 250 lb in (11HTBF250 QA1 7HT550, One Silver Steel Coil Spring 2.5In X 7 550# Performance. These silver powder coated springs fit perfectly with QA1's Pro Coil Shock Systems. These springs are available with flat and pigtail ends and in 10" and 11" free lengths. Made with the highest quality materials, QA1 springs are strong, consistent and have a long life. All QA1 springs are manufactured using the highest quality materials for high strength, consistency and long life. They are cold wound, heat treated and shot peened to ensure consistency, accuracy and durability. All QA1 springs are ground at both ends to ensure straight, consistent and accurate operation. They are either silver powder coated for excellent longevity, or are polished and chrome plated for the ultimate in appearance. Lengths and rates are clearly marked for quick and easy identification. All QA1 springs are lifetime guaranteed to remain within 2% of the original free height and rate under normal operating conditions. Lifetime guarantee to remain within 2% of their original free height Designed to be as light as possible with maximum travel and superb performance Durable powdercoated finish Made in the USA Attributes: Brand Name: QA1 GTIN: 00806990119858 Color: Silver End 1 Type: 4. 1in ID Flat End 2 Type: 2. 5in ID Flat Finish: Powder Coated Free Height: 11 Grade Type: Performance Manufacturer Part Number: 11HTBF300 Material: Chrome Silicon Alloy Maximum Inside Diameter: 2. 5 Seat Included: No Spring Rate: 300 Spring Type: Tapered Spring Powder Coated Suspension Grade Type: Performance UPC: 806990119858 Extended Information: Country of Origin: US Emissions : 4 Packing Information: Quantity of Each: 1 Package UOM: EA Dimension: 12 x 6 x 6 inches Weight: 6. 28 POUNDS