Wild Things™ heads are the most technologically advanced heads on the market. Mike Roland’s designs carefully balance the production of awesome horsepower and torque with the important qualities of a good street motor - starts as easy as a stock bike, runs on pump gas without any detonation at all, runs cooler than stock, and is as tractable as a stock bike.
Features:
- Efficient bathtub combustion chambers
- Set up to take up to .640” lift cam
- Proprietary valves designed on the flow bench to match Wild Things™ ports
- Hard valve seats for use with lead-free fuel
- Intake Ports - 3/8” raised high flow and high velocity with 1.980” stainless intake valves
- Exhaust Ports - Constant radius “D” high flow and high velocity with 1.630” stainless exhaust valves
- Utilizes equal length head bolts to minimize cylinder distortion and promote consistent head gasket squish. Requires purchase of four long OEM headbolts, sold separately. (H-D® P/N 16478-85A)
- Extra cooling fin area
- Larger and improved breather passages, requires crankcase breather kit with 1/2”-13 breather bolts
- Larger and relocated oil drains
- All stock part will mount to head
Heads come completely assembled. The High-strength stainless steel valves, high-performance valve springs and titanium top retainers will handle up to a .640-lift cam.
Wild Things Billet Heads for Twin Cam
These beautiful heads are CNC machined to exacting standards from 6061T6 billet aluminum then polished to bright sheen for killer good looks.
Domed Piston - 95" Applications Only:
- Requires us of Wild Things™ Pistons, P/N 444 or 443 (sold separately)
- Combustion chamber machined with 15-degree squish
- Yields 10.5 to 1 compression ratio
Flat Top Piston:
- 81cc combustion chambers
- Yields 9.5 to 1 compression ratio in 95" applications
- Yields 10.5 to 1 compression ratio in 103" applications
