*Cylinders and heads can be exchanged for a refund when buying top end kits.

***Payment for top end kit can me mailed with cylinder or cylinder/head combo that is being exchanged. Just deduct correct exchange refund amount from price of top end kit payment.

****When paying for top end kit through website, ship cylinder or cylinder/head combo exchange to us and we'll send a refund check back to you once we receive your exchange.