You're looking at the official n00b guide for the mk4 section. To cut down on stickies, I've linked all of the old stickies in this thread. **This is a work in progress** Myself, along with all the other moderators will be adding info to this thread periodically, and if you feel something isn't here that should be, please PM me.
All you need to know about:
Exterior mods Curious about different bumper setups? Want to know what a "boser" is?
Head and tail lights Looking for different light setups, or just want to know what a "Joey mod" is?
Intakes Can't decide between a cold air or short ram intake? Or want to learn about this "Swiss cheese" mod?
Exhaust systems Want to figure out which exhaust system is best for your engine? Or how about just listening to some different set ups?
Fuse list Need to find out which fuse is which? This will tell you.
Suspension All you need to know about upgrading
Wheel and Tire fitment Fitment questions? Need to know was "ET" is?
Synthetic oil vs. Regular Want to make sure you are using the right oil grade?
Diverter Valve vs. Blow Off Valve Learn why diverter valves are better for your VW than blow off valves
Stance Check out some different tire set ups and decide which size is right for your new wheels
Have questions about bolt on mods? Refer to your designated engine's thread.
2.0L bolt on mods
1.8T bolt on mods
Some helpful links:
Master Do-It-Yourself List
Official List of VW part sites
Retailer Reputation Thread
Free Diagnostic Software
Stock MK4 wheel specs
Official Coilover thread
List of Relays
Why OEM G12 coolant is best for your VW
Ultimate Guide to Going Low