Don't gut the cats, spend the $200 for a down pipe and a mid-pipe. Then you can still use your cats to pass emissions.

You can either plug plug the hose that goes to the AC&CV, block off the hard line that bolts on to the AC&CV, or just buy a AV&CV block off plate from K2RD.

replacing the power antenna was the first thing I did to my S4 (there was just a hole there). I bought a generic after market power antenna from Best Buy, and the only problem I had was forgetting to ground it. After I figured that out, it worked fine. Are you trying to replace the whole motor/mast assembly, or just one part (mast)? The aftermarket one bolted right in, after widening the holes a smidge with a drill (the ones on the new antenna weren't far enough apart, but only by a few mm).

I had to order one from a dealer. I was cheaper than I could find one at a salvage. I have the anteanna in now and it works fine. Now I want to take out all the oem air intake system. Will this affect the car or other accessories if I remove the air pump? I know that it will reduce the drag on the engine becasue that is one less thing to turn, what negative things do I need to expect?

there's a fairly recent discussion on this topic in the 2nd gen FAQs...something like, "acv and air pump for us noobs"



cancel that, that thread sucks...there was a lengthy one someone around here....

Removing the air pump on your s4 won't affect anything negatively except maybe the water pump/fan pulley slipping a bit due to you just having the one belt on it. You may want to get also a dual alternator pulley so you can have two belts spinning the water pump pulley. BanzaiToyota sells them for I think $20.

Cool, thanks. I am planning on doing the intake swap this weekend and hope to get at least a good cat-back in the next couple of weeks. When the weather warms up I am going to start fixing the body, several scratches and dings, and then fresh paint.