Skunk2 521-99-1060 Race Spring 8.00" x 2.50" I.D. 10kg/mm Straight Coilover Spring

The Skunk2 521-99-1060 Race Spring is an 8.00-inch straight coil spring with a 2.50-inch inner diameter and a 10kg/mm (560 lb/in) spring rate, designed for experienced tuners who want precise control over their coilover suspension setup. Sold individually, this spring is the same unit found in Skunk2's adjustable coilover kits and is compatible with Skunk2 Pro-ST, Pro-C, and Pro-S II coilovers, as well as any shock with equivalent diameter spring perches.

Key Features:

• Length: 8.00 in (203.2mm)
• Inner Diameter: 2.50 in (63.5mm)
• Spring Rate: 10kg/mm (560 lb/in)
• Shape: Straight
• CNC-wound from premium SAE 9254V spring steel for consistent rate and durability
• Shot-peen stress relieved for enhanced fatigue resistance
• Phosphate coating plus gloss powder coat finish for corrosion protection
• Compatible with Skunk2 Pro-ST, Pro-C, and Pro-S II coilovers

Part Number Decoder: Skunk2 race spring part numbers follow the format LLLL.DDD.RRR — where the first segment is the spring length (in tenths of an inch), the second is the inner diameter (in hundredths of an inch), and the third is the spring rate in kg/mm. For reference: 1 kg/mm = 55.88 lb/in.

Sold as a single spring. Whether building a custom track setup or fine-tuning an existing coilover kit, Skunk2 Race Springs deliver the quality and consistency needed for serious performance suspension tuning.