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I just bought a 2003 Jetta Gli and was just wondering what kind of engine upgrades I should consider putting in???
 

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Cold Air Intake, Cat back exhaust, Turn2 Lightweight crank pulley, GIAC Chip.

Thats about it for the VR6, short of Camshafts, big valve head, and forced induction.

The four listed above made a big difference on my 12V VR6...they will most likely help you as well.
 
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