Kuryakyn Wild Things Heads Billet Street Heads for Twin Cam

Kuryakyn Wild Things Heads Billet Street Heads for Twin Cam

Wild Things


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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.

  • 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.

KA-432 requires the use of Wild Things Domed Pistons KA-444 or KA-443. For 95" applications only. Combustion chamber machined with 15* squish. Yields 10.5:1 compression

KA-433 have 81cc combustion chambers. Yields 9.5:1 compression in 95" applications, 10.5:1 compression in 103" applications.

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