S&S Cycle 90-2002 Intake Valve Seat 2.000" for 89cc/91cc Super Stock Heads

The S&S Cycle 90-2002 is a precision-engineered 2.000-inch diameter intake valve seat designed specifically for S&S Super Stock cylinder heads with 89cc or 91cc combustion chambers. This replacement valve seat is an essential component for maintaining optimal engine performance during head rebuilds or valve service on Harley-Davidson Big Twin and Evolution-style motors equipped with S&S heads.

Key Features:

• 2.000-inch (2.0") diameter intake valve seat
• Precision-machined for accurate valve sealing
• Compatible with all S&S heads featuring 89cc or 91cc combustion chambers
• Sold individually
• Made in the USA

Important Installation Note:

This valve seat will require professional grinding and machining to properly seal the valve. Proper installation requires specialized valve seat cutting tools and experience to ensure correct valve-to-seat contact and optimal sealing. This is a precision component that must be installed by a qualified motorcycle mechanic or engine builder.

S&S Cycle Super Stock heads with 89cc/91cc chambers use 2.000-inch intake valves paired with 1.605-inch exhaust valves, making this the correct intake seat for these high-performance cylinder heads. When rebuilding or servicing your S&S heads, using genuine S&S replacement parts ensures proper fitment and maintains the performance characteristics your engine was designed to deliver.