124" and 128" Big Bore Kits for Milwaukee-Eight - 128" Big Bore Kit M8 Blk

$1,595.95

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Details

SKU: 910-0684
Manufacturer: S&S

Description

128" Big Bore Kit M8 Blk

Color: Black
Size: 114" to 128"

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 128" Big Bore Kit is a bolt-on upgrade for Milwaukee-Eight engines, specifically increasing displacement from 114" to 128" without requiring machining or case modifications. The kit features premium aluminum cylinders with cast-in iron liners, forged pistons, and an 11:1 compression ratio for improved performance. It includes all necessary components for installation, such as cylinders, pistons, rings, and gaskets (head, base, and exhaust). Designed for both 107" and 114" M8 models, this kit delivers significant power gains while utilizing stock cylinder heads. Professional installation is recommended to ensure proper clearances and assembly specifications.