Sidewinder .650" Valve Spring Kits / '88-'17 Models

Unlock the full potential of your Harley with the S&S Cycles Sidewinder® .650" Valve Spring Kits, engineered to propel your ride into new realms of power and durability. Perfect for '88-'17 Harley models, this comprehensive kit is designed to support valve lifts up to .650" (1.65 cm), ensuring your engine operates at peak efficiency without compromise. What's Included: High-Performance Springs: Specially designed for optimal tension and durability. Precision Engineered Collars and Keys: Upper and lower collars along with keys for a perfect fit and performance reliability. Impressive Specs: With 1.860" (4.72 cm) installed height, these springs can handle 178 lbs. (80.74 kg) of force, escalating to 376 lbs. (170.55 kg) at maximum lift, ensuring your engine breathes freely and efficiently. RPM Ready: Designed to withstand up to 6500 rpm, making them ideal for high-performance scenarios. Why Choose S&S Cycles Sidewinder®? The Sidewinder® .650" Valve Spring Kits are not just a