- Crankshaft of nitride steel for improved durability
- Larger crank pin radius for improved torsional strength
- 10mm longer crank front to reduce fretting
- Upsized HKS originally designed main stud bolts
- 2nd and 3rd molybdenum journal for extra durability
- Line boring to ensure journal roundness
- Improved valve heat transfer, beryllium valve seats, phosphor bronze valve guides.
- HKS recommends using HKS Racing Pro 10W50 Engine Oil