Hello, I just bought an 04' A4 quattro 5spd with an excellent warranty. As I don't want to void the warranty I am somewhat limited in what could be modded, but my friend is telling me I should purchase a K&N air filter immeaditly as it gives power, cleaner, improves mpg and gives the turbo a nicer sound. Is this true? Is it worth it? Are there any other modifcations that can be done that wouldn't void the warranty? Thanks.

 

I'd skip the K&N and find an Audi dealer that sells REVO software.
Best upgrade you'll ever do, for the money.

 

Oh yeah, a K&N filter is good for at least.... 2hp. A K&N filter won't really do much for you performance wise, it will just last you longer than a paper one. It will give you a couple mhp, though. (Mental Horsepower)

 

^ ^ Yup! And if you're really lucky, it'll also take out your MAF.

 

thats all tru but exhaust, K&N and maybe airbox mod would all do you good and not void warranty