Only fits machines equipped with Pro Design Big Bore cylinder heads (sold separately)
CNC machined from billet aluminum
Interchangeable O-ringed domes allow you to adjust compression for fuel quality, elevation, timing or performance
Substantial increases in cooling efficiency
Made in the USA
Product Note:Only fits machines equipped with Pro Design Big Bore cylinder heads (sold separately).
Specification
Details
Bolt Pattern
4/156
Bore
68.5 mm
Material
Aluminum
Size
16cc
Size Over Standard
4.5 mm Larger than Stock
Vehicle Fitment
Fitment is guaranteed or your money back plus free return shipping.
Don’t waste time installing a product that doesn't fit. We worked hard ensuring that this product is an exact fit on the vehicles listed below.
