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The factory bolts typically can't handle the additional pressure in high-performance applications which can lead to the cylinder heads lifting
The PERRIN Cold Air Intake adds 10-20 wheel horsepower and 10-17 ft lbs of torque to your car without adding any check engine lights or other issues
The flex plate is bolted to the crank shaft
The included FOX shocks from Fox Factory deliver improved damping control
Perrin 04-06 Subaru WRX STI EJ Engines Alternator Pulley - Black to be categorized The factory bolts typically can'tPerrin 04 06 STI EJ Engines Alternator Pulley Black
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