Originally Posted by chris_cain
why does the intake make it run too lean or what is the reason for that and what do you recomend for the tuning?
It's not so much that it makes it run lean, which it does in some cases, but that it throws off the MAF readings significantly. The MAF is very sensitive to not only airflow volume but airflow turbulence. An intake like the HKS will drastically change the tune by messing up the MAF, so it's not a good idea to install it without getting tuned for it. It also isn't even necessary. The HKS RS is a very expensive part for what you get, which is mainly a lot of noise.
As for tuning, Dynoflash is who I've used from the beginning, but we also have a local tuner here in the RM region that I would suggest for you, since Dynoflash is in Connecticut. Our local tuner is Justin who goes by the username JustDSM, so you can send him a PM to setup a tuning session after you install the parts. I recommend getting a Walbro fuel pump between now and then if you can.