Unorthodox Racing Tuner S Crank Pulley for 2002+ WRX and 2004+ STi #16772

Unorthodox Racing's new Tuner Series underdrive crank pulleys and adjustable cam gears set a new standard for accuracy and finish at a price-conscious level. Tuner Series products are CNC-machined from lightweight 6061-T6 aluminum billet. Premium U.S. made 6061-T6 aluminum billet ensures the consistency of the material’s strength and balance. Tolerances are held to within .001". Tuner Series Underdrive Crank PulleysUR's Tuner Series underdrive crank pulleys provide power gains across the entire RPM range. Power gains are obtained from the weight loss. An average of 2.7 HP is gained from every pound lost off the crank shaft. 85% of our gains are from weight loss.Additional power gains can be seen from the underdriving of all the accessories (which accounts for about 15% additional gain). However, we do not push underdriving 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.An important point, at this price conscious level, is that critical tolerances on these parts are held to .001". This is something never before seen in this price range.Only Available in Polished Finish Details   Weight 5.00 lbs Price: $99.00 Options   Quantity 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50  Add to cart

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