What intake...
#1
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I bought a 99' z28 a4 car and after I purchased the car I noticed it was leaking oil profusely! After doing research on this site I had discovered what I believe my problem was. My oil pressure sending unit was broken into two pieces. Now that being said to replace the part I had to completely remove my intake. My car has a smog delete and egr delete and everyone I have come into contact with says go ahead and find an intake to replace the stock with its a quick easy mod to do especially since mine is already off now. My problem is that I don't really have enough evidence or really a good general idea of where to start. Any help is greatly appreciated and this car is going to be a daily driver at some point it's a project now. I'd really love to find out a good road to start down with this car.
#3
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Depends on what you want out the car. Ls6 is the best bang for the buck. You can find them around 300 350 used. Get a ported throttle body and that's a very nice upgrade. If you want more, then look in to the fast 92mm or 102mm. The 102mm will require a cpl more things to bolt on.