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Description

The blue RR Racing Ultimate Damper Pulley replaces the stock Lexus cast iron crank pulley with a much lighter, harmonically dampened pulley that absorbs crankshaft vibrations. The new crank pulley allows for power transfer to the wheels through a significant reduction in rotational inertia while fully dampening crankshaft vibrations to enhance engine longevity.

Features of Our Ultimate Damper Pulley Include:

• Nearly 50% rotational weight savings on the crankshaft (see comparison photo below).
• Over 5X reduction in rotational inertia!
• Fully harmonically dampened using an internal inertia ring and 8 vibration-absorbing elastomers.
• Aerospace-grade 15-5 stainless steel inner hub capable of withstanding high loads (compatible with our supercharger applications).
• Billet T6 Aluminum outer shell for high strength and low rotational inertia.
• Less rotational inertia on the crankshaft leads to quicker downshift blips and improved throttle response.
• Approximately 0.2 seconds improvement in measured 20-68 mph acceleration as proven by our in-house testing (see comparison chart).
• Compatible with RR Racing Supercharger kits, designed to allow for "bolt on" installation of our secondary SC drive pulley.

How Much Power Will This Pulley Make?

It is a common misconception that reducing weight on any engine component generates power. Reducing the weight of rotational components primarily improves acceleration in lower gears, where the rate of acceleration is high.

What is a "Harmonic Damper?"

Most modern engines are internally balanced but still feature a harmonic balancer crank pulley. The supplied OEM crank pulley on the ISF/RCF/GSF/IS500/LC500 is made from heavy cast iron and has a rubber-suspended ring that helps reduce vibrations and improve component lifespan. Our Ultimate Damper features an internal inertia ring along with elastomers on both the inside and outside, allowing for effective vibration damping.

How Did You Conduct Your Performance Testing?

All testing was conducted in 2nd gear from a 20 mph roll to eliminate tire slip as a variable. We utilized a Dragy performance meter and accounted for consistent conditions during our tests.

For more details, please see the Gear Damper for Automotive Interior.

Compatibility Table

Make	Model	Year Range
Lexus	ISF	All
Lexus	RCF	All
Lexus	GSF	All
Lexus	IS500	All
Lexus	LC500	All

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Average Rating:

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Total Reviews:

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