Performance Replacement Cylinder Heads for Evolution Big Twin Engines - Head Kit Evo Bt Blk

Retail Price: $1,559.95
You save: $93.00 (6%)
Our Price: $1,466.95

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Details

Model: 106-4570
Shipping Weight: 24.3lbs
9 Units in Stock
Manufactured by: S&S

Description

Head Kit Evo Bt Blk

Color: Black

California Restricted

California laws prohibit (in most cases) the use of any aftermarket product whose installation requires the removal of any emissions control related components as regulated by the California Air Resources Board (www.arb.ca.gov).

If an item is designated as "Competition and Racing Vehicles Only", we will require a race waiver be digitally signed before an item can ship to California. If an item is to be exported from California, an export waiver is available as well. This is a REQUIRED guarantee from you that a restricted item will NOT be used on any public highway in California; only on private race tracks in racing or competition use.

The S&S Cycle Performance Replacement Cylinder Heads are designed for Evolution Big Twin engines (1984-1999 models), offering enhanced performance for smaller displacement engines. These heads are optimized to work with stock-style flat-top pistons and feature an 82cc combustion chamber that slightly increases compression ratios (8.8:1 in 80" engines and 9.5:1 in 96" engines). The precision-engineered port design improves airflow while maintaining velocity for better performance. The kit comes fully assembled with stainless steel valves (1.90" intake and 1.75" exhaust) and high-lift (.585") springs, supporting a maximum lift of .585". These heads are EFI-compatible and designed to use the stock intake manifold. Intake manifold and gasket kits are sold separately. The gasket kits include head gaskets, base gaskets, and exhaust pipe gaskets but exclude rocker box gaskets, as rocker box styles vary.