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2008-2014 STI
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GFB3 pc Underdrive/Non-Underdrive Pulley Kit 2008-2014 WRX / 2008-2021 STI
Go Fast BitsOriginal price $365.00Original price $365.00 - Original price $365.00Original price $365.00Current price $328.50$328.50 - $328.50Current price $328.50| /It might be hard to imagine how reducing the mass of a pulley makes a car go faster, but accelerating a heavy factory pulley from say 3000-7000 RPM...
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GFB Mach 2 TMS Recirculating Diverter Valve 2004-2021 STI
Go Fast BitsOriginal price $212.00Original price $212.00 - Original price $212.00Original price $212.00Current price $190.80$190.80 - $190.80Current price $190.80| /Blow off sound not to your taste? Want something as “sleeper” as possible? Don’t want your partner to know you’ve stuck a turbo on the daily (again...
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GFB Crank Pulley (Not Under-Drive) 2002-2014 WRX / 2004-2021 STI
Go Fast BitsOriginal price $179.00Original price $179.00 - Original price $179.00Original price $179.00Current price $161.10$161.10 - $161.10Current price $161.10| /Install a GFB Non-underdrive light-weight under-drive pulley kit and get better throttle response and more power! How do they do this? 1. Less weig...
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GFB 2 Piece Under-Drive Pulley Kit w/ Belts (Crank & Alternator) 2002-2021 WRX/STI
Go Fast BitsOriginal price $260.00Original price $260.00 - Original price $260.00Original price $260.00Current price $234.00$234.00 - $234.00Current price $234.00| /One of the ways that you can improve the response in your engine is by adding a lightweight pulley set. Lightweight pullies have less rotational ma...
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GFB TMS Respons Blow Off Valve Kit 2002-2007 WRX / 2004-2021 STI
Go Fast BitsOriginal price $342.00Original price $342.00 - Original price $342.00Original price $342.00Current price $307.80$307.80 - $307.80Current price $307.80| /If cars like yours typically suffer issues such as backfiring and stalling when using a fixed-ratio atmosphere-venting BOV, the Respons can help. B...
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GFB Deceptor Pro Blow Off Valve Kit 2002- 2007 WRX / 2004-2021 STI
Go Fast BitsOriginal price $504.00Original price $504.00 - Original price $504.00Original price $504.00Current price $453.60$453.60 - $453.60Current price $453.60| /Control the sound of your BOV "ON-THE-FLY." Go on, admit it. There are times you wish you could have that signature turbo blow off sound, but you'r...
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