S&S Cycle Valve Spring Kit 0.550" Lift for Panhead and Shovelhead Engines 48-84 | Part No. 90-2053

Valve Spring Kit - 0.550" Lift - Panhead | Shovelhead Engines '48-'84

The S&S Cycle Valve Spring Kit (Part No. 90-2053) is designed to optimize valve operation in Harley-Davidson Panhead and Shovelhead engines from 1948 to 1984. This kit provides additional rocker clearance for models from 1948 through 1965, ensuring proper valve function and reducing the risk of valve-to-rocker interference. It is compatible with stock-style bottom collars, valve guides, and valves with a 3/8" stem diameter, making it a reliable upgrade for stock engine configurations. The kit is also suitable for use with thin-stem valves when thicker keepers are employed to maintain correct valve stem-top collar engagement, providing flexibility for various valve setups. Included are late single bottom collars, specifically designed for use with S&S cylinder heads on Shovelhead models and stock late '81-'85 heads, ensuring proper installation and performance across different engine styles. Made in the USA, this valve spring kit is engineered to support camshaft lifts up to 0.550", offering increased performance potential without compromising reliability. Whether you're restoring a vintage Harley or upgrading for better performance, this kit provides the quality and compatibility needed to ensure smooth, reliable operation in your Panhead or Shovelhead engine.

Features:

• Designed for Harley-Davidson Panhead and Shovelhead engines from 1948-1984

• Allows additional rocker clearance for 1948-1965 models

• Compatible with stock-style bottom collars and valve guides

• Suitable for valves with 3/8" stem diameter and stock keepers

• Supports thin-stem valves with thicker keepers for proper engagement

• Includes late single bottom collars for S&S and late '81-'85 heads

• Engineered to support cam lifts up to 0.550"

• Made in the USA for quality assurance