• Bolt-on kit, the largest cylinder bore possible without requiring machining of the crankcases
• 4.250" bore, 4.500" stroke
• 11:1 compression ratio
• Forged pistons
• All necessary gaskets and hardware required for installation included
• Not honed.
• Made in the U.S.A.

DISCLAIMER: FOR CLOSED COURSE COMPETITION USE ONLY. NOT INTENDED FOR STREET USE. LEGAL IN CALIFORNIA ONLY FOR RACING VEHICLES WHICH MAY NEVER BE USED, OR REGISTERED OR LICENSED FOR USE, UPON A HIGHWAY.

Fit: 

• Harley-Davidson M-EIGHT 117" Engines