

Option 2: Exchange Parts, MUST send your cylinder and exhaust valves within 14 business days. As soon as you do, the charge will be refunded.Option 1: Purchase Outright - No core cylinder, head, or exhaust valves are required to be sent in - Raises kit price by $1450.

If it is peak season please call to verify we have cylinders in stock otherwise we will have to use your cylinders for boring and porting which extends lead time out

For best results, purchase our complete big bore.A Torque Link tune, BMP performance manifold, Fatt Azz Pipe & clutching changes are required.195-215 horsepower! (Depending on exhaust configuration).Patriot 900 Big Bore top end kit fits all Patriot 850 models.
