High-quality cast Big Bore Cylinders from Twin Power™. Factory style black textured powdercoat finish with highlighted fins. Cast in iron liners for strength and durability and finish honed and ready to run.

• Direct bolt-on, requires no machine work to crankcases or cylinder heads
• Increases 107 in. engines to 124 in. and 114 in. engines to 128 in.
• Includes cylinder head dowels
• Sold in pairs