The Fluidampr Solution Fluidampr performance harmonic damper utilizes a unique viscous silicone fluid to control all harmonic vibration at all rpm. Fluidampr responds to the amplitude (intensity) of crankshaft vibration, regardless of engine speed or the frequency at which it occurs. Fluidampr offers maximum control of all engine harmonic vibrations in any performance race or street engine. Provides maximum control of destructive crankshaft vibration at all engine speeds - Fluidampr is amplitude sensitive, so it responds to the intensity of vibration regardless of the frequency, unlike any other aftermarket damper available. Extends crankshaft and bearing life - reduces harmonic vibration for reduced wear on the main journals and main bearings.  Increases horsepower and torque  - Reduced crankshaft vibration eliminates spark scatter and large variations in crank timing, so the engine can release trapped power. Requires no service or maintenance - Fluidampr's inertia ring and silicone fluid are hermetically sealed inside a laser welded, steel billet or forged housing. Improves valve timing accuracy and ignition stability - Fluidampr reduces the torsional vibration that can be transferred to the camshaft through the timing chain, gear or belt. Quiet operation - There are no noisy discs which may cause wear to other damper components. Timing marks cannot slip - Fluidampr's timing marks are stamped in 2° increments from 0° to 50° and at 90°, 180° and 270° on the outer housing, which is manufactured integrally with the hub SFI accepted, ezplosin proof - Fluidampr is safety tested to 12,500 rpm and meets SFI 18-1 specifications Proven over 15 years in racing and high performance street applications Dyno proven to reduce 50% More Vibration than the leading aftermarket elastomer damper 100% Satisfaction guarantee or your money back