Athena 2 Stroke Big Bore Kits  

              KX500 Big Bore Kits                                           Athena 4 Stroke Big Bore Kits

Cylinder Works-4 Stroke Big Bore Kits         Magnum-4 Stroke Big Bore Kits               L.A. Sleeve-Honda

                                                                                                                                                                    L.A. Sleeve-Kawasaki

                                                                                                                                                                    L.A. Sleeve-Suzuki

                                                                                                                                                                   L.A. Sleeve-Arctic Cat

                                                                                                                                                                   L.A. Sleeve-Yamaha

Wossner Big Bore Piston Kits                               Pro X Big Bore Piston Kits              Wiseco Big Bore Piston Kits

*Cylinders can be exchanged for a refund when buying big bore kits.

**Heads can also be exchanged with cylinder for a larger refund if the big bore kit comes with a head.

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

****When paying for big bore 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.