【Short block VR38 4.3L STEP Pro】

A short block that includes the VR38 4.3L Capacity Upgrade kit.
It further strengthened the crankshaft and crankshaft main bearing cap for assuming the circuit driving.

・Expected use scene: Circuit
・Assumed torque: ~ 1500 N∙m

The assumed torque came from the in-house test data. We do not guarantee the use of the product without any damage.
Please note that the allowable torque may vary depending on the specifications of a vehicle, road surface conditions, driving conditions, travel distances, and so on when using the product on the actual vehicle.

• The crank for STEP Pro changed the material to nitride steel and treated the surface with ion nitriding to improve durability by enhancing the surface hardness and hardened layer.
• Expand the R-corner of the fillet weld in the crankpin to improve the torsion strength.
• Prevents fretting by extending the crank nose 10 mm longer.
• HKS original main stud bolt with thicker screws is used.
• Enhance the strength by changing the material of #2 and #3 journals to Chromium-molybdenum steel.
• Line boring for securing the roundness of the journal.
• The main bearing and connecting rod bearing are highly selected through various tests.
• The crank damper pulley (provided) developed only for VR43 engines reduces torsion vibrations.