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I just bought a new 2004 Ce - coupe auto(wife) 3.15 axle
I would like to add an additional 50-100 horsepowers but don't want to break the bank, plus any warranties issues.
What's are the best mods
Thanks for all suggestions.
Adding 50-100 RWHP will be very difficult without warranty issues. The easiest & cheapest way would be to use NOS. If you want to stay NA you will need to add bolt on's like headers, intake and cam only or a H/C package. Since you have an A4 you will also need to install a T/C and gears to take full advantage of a cam or H/C package.