EvoKiller.com: Subaru Wrx and STI Performance Parts :: Engine :: Engine Pulley's :: Unorthodox Racing Ultra SS Pulley Sets for 2002+ WRX and 2004+ STi

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EvoKiller.com: Subaru Wrx and STI Performance Parts :: Engine :: Engine Pulley's :: Unorthodox Racing Ultra SS Pulley Sets for 2002+ WRX and 2004+ STi

Unorthodox Racing Ultra SS Pulley Sets for 2002+ WRX and 2004+ STi #16771

Unorthodox Racing Ultra Series pulley sets are available in a number of versions: 1) factory belt layout with underdrive (Ultra SS), 2) our new 12-Volt Charger Series with no underdrive (Ultra SSc). Our Ultra Series pulley sets build upon the success of our crank pulleys with the addition of accessory pulleys. Like our crank pulleys, Ultra Series pulley sets are CNC-machined from lightweight 6061-T6 aluminum billet. Premium 6061-T6 aluminum billet ensures the consistency of the material's strength and balance. Tolerances for each crank and accessory pulley are held to within .001". In addition to the numerous machining steps taken to ensure the crank pulley is the lightest possible design, each accessory pulley is also lighter than the factory piece it replaces and includes lightening holes where possible. Our aluminum accessory pulleys are also an excellent replacement for the brittle plastic pulleys found on many late model cars. Premium fit and finish ensures a beautifully matched set you are proud to display under the hood of your vehicle.Unorthodox Racing pulley sets on average can provide gains of 8 to 15 HP and 6 to 10 lbs.-ft. on normally aspirated engines and 10 to 18 HP and 10 to 20 lbs.-ft. on forced induction engines. Higher gains can be realized on vehicles that are modified.Power gains are obtained through weight loss on all our pulleys. An average of 2.7 HP is gained from every pound lost off the crank shaft. 85% of our gains are from weight loss. In most models we introduce underdriving for additional gains. With the lighter accessory pulleys, as much as 15% to 20% more power can be found.Underdrive Series (Ultra SS) Our Underdrive Series of pulley sets provide power gains through weight loss and through the underdriving of all the accessories (which accounts for about 15% additional gain). However, we do not push the amount of underdrive for two main reasons. First, it is important to keep charging systems, air conditioning, power steering, and water pumps moving fast enough for every day driving. Second, not much horsepower is gained from extreme underdriving. In most applications all of our underdriving is done with the crank pulley, not the accessory pulleys. This is done so maximum weight loss can be achieved at the crank where most of the horsepower gains are found. Most Ultra Series underdrive pulley sets are available in natural polished aluminum as well as black, red, and blue anodizing.3-Piece Set: Crank, Alternator, and Power Steering2-Piece Set: Crank and Alternator

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Weight 45.00 lbs
Price: $219.00

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