Gruppe-s Crank PUlley - Subaru WRX Forum
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post #1 of 2 Old 07-13-2006, 12:09 AM Thread Starter
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Gruppe-s Crank PUlley

I have a full turbo back with a up-pipe and was looking at getting a gruppe-s crank pulley. Does anyone know if its hard to install or if it will help out at all? Looking for any input
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post #2 of 2 Old 07-13-2006, 12:29 AM
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didnt install the gruppes one but I did install a Perrin light wieght on my car in about 30 minutes following the instructions here

faster revs was about all it helped with

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