The new 2015 Subaru WRX is a complete redesign with some features that people like and do not like. Starting with the front end, Subaru tends to put their focus there. Going back through the Subaru WRX chassis since landing on USA shores, the front is really the main part that has changed. Only in 2007 when they switched to a 5 door hatch for the STI did they really stray away from the normal Rally inspired sedan. Their trademark feature of the big rally wing and boxxer motor is what makes the Subaru unique.
With the 2015 Subaru WRX, they really changed it up. Where the STI retains the same style engine and turbo that we have seen since 2002, the WRX now has the turbo mounted right off the header. The downpipe is completely different but the catback exhaust is the same as the 2008 and up WRX. The Boxxer Engine is still a 2.0L turbo that makes 268bhp. The top mount intercooler is similar in design to the older 08+ WRX. The pulleys are slightly different so require an entirely new engineering design. This is where Tomioka comes into play.
We all know that less rotational mass is always better. The rotational weight has a factor of 3 compared to static weight. So when you save 3lbs on a rotational weight item, it is really like saving 9lbs. Changing out the pulley system will give your Subaru WRX much quicker throttle response as there is less engine load. In the case of these Tomioka Racing light weight water pump pulley, it shaves off 56% from the original pulley. This makes the engine easier to move with less mass. For reference, the factory pulley weighs in at 320 grams where the new Tomioka pulley weighs only 140grams. The pulley is made from CNC machined aluminum that has then been anodized in gold and is a 100% bolt on. This is a very highly recommended product for the 2015 Subaru WRX.
TR-TM2051
Tomioka Racing Lightweight Water Pump Pulley Subaru WRX 2015+
$110.00
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