90-2039 Aluminum upper valve spring collar .550" lift

This S&S aluminum upper valve spring collar is specifically designed for .550-inch lift applications. It serves as a stock replacement for early S&S Shovelhead-style cylinder heads produced before November 2000. It is important to note that S&S heads manufactured after this date typically utilize a .590-inch lift spring kit, so verifying your production date is essential for correct fitment. Machined from high-quality aluminum for strength and weight savings, this collar is a critical component for maintaining the valvetrain integrity of your high-performance Shovelhead engine. It provides the precision fit and durability that S&S Cycle is known for, ensuring your top end remains reliable under the stresses of operation.