The Mitsubishi is a serpentine belt engine and benefits from under-driving the accessory pulleys to reduce parasitic power losses from the alternator, air conditioning, water pump and power steering at high engine RPMs. A smaller, lighter harmonic balancer is like a lightweight flywheel and can sharpen throttle response and allow the engine to rev out faster.
Powerbond have now released a 20% under drive billet steel balancer for the 4G63T that is SFI approved for all forms of motor sport. The precision CNC machined steel hub and inertia ring is assembled using Powerbond's pressure bonded rubber eliminating balancer separation and spinning. Every Powerbond unity is dynamically balanced at the factory for smooth running at ultra high RPMs.

Application: Mitsubishi 4G63T engines