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I have an Audi A4 2007 and I am looking for a performance chip that will noticeably make a difference in my cars performance. I don't want a performance chip that is cheap but also not crazy expensive. I've been looking all over the internet and reading reviews but i cant find anything. Im also not interested in the GIAC or APR tuning. Please help me.

APR or GTFO. No joke.

GIAC is great too.

Cheap, 99% of the time = crap product that probably does more damage than good.

you already have a vehicle that has been pretty much tweaked to its maximum potential, and if you try to force it past the point it is now, it will rapidly self destruct and become your broken dream car of yesrerday, ok? I suggest that you be happy with what you have, an audi is an expenisve volkswagon and has the s. ame potential problems that the a4 is well known for including engine head gasket problems after 80 k along with possible oiling problems with the engine. and transmission problems around 130,000. Now to solve your temporary dilemma for more speed which is at the crux of your maxed out vehicle, save your money and buy a bigger more powerful engine in another audi with a bigger more powerful turbo, this will satisfy far beyond some fake worthless power chip for chumps.
You have been given the secret of worthless ness of power chips, now make sure you can get out if your audi and into what you need. best of luck.