I have an 06 Scion tC. I am looking to start adding parts to my tC, however, it looks like I am a little confused when it comes to which of the above to buy. I understand that an entire exhaust system will remove the stock pipes, guages, and muffler that my tC already has, but I am just looking for that aggressive sound. Would I need to replace the entire system in order to achieve that sound, or can I just got the inexpensive route and buy the muffler only? Would just the muffler give me some more HP? Would it increase or decrease gas mileage? Which is better longterm? Finally, I live in MA. I would like to get this system/muffler, but I also want to continue passing my car inspections. Which muffler/exhaust system would continue me to do so? Thanks in advance!
For emissions the axle back is probably the best you can do. Though Ptuning does have the s-pipe+cat back exhaust, should pass emissions, then again I don't know what an emission test is. We have it here in Tx, but the place I go to, they don't care, they just slap on the sticker, THEN check head/tail lights, horn and braking. But muffler is more or less nothing more than an axle back, connects from the rear axle, and is pretty much just the muffler and tip. The cat back is rom the catalyitic converter back, and s-back is from the s-pipe back, and then there's the s-pipe+cat back option, which replaces everything. It won't add power but will actually change the throttle, due to the less restrcitive piping, so you'll feel more sensitivity in the throttle in acceleration, same with an intake, more of a throttle input changer than a power adder. Good intake and full exhaust (including header) combo can gain you a great deal though, and adding some new cams will be even better, helps the car inhale/exhale better.
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First of all, if you want JUST more aggresive sound, changing the mufflers will be enough. It will give you a little bit of a performance boost, but only marginal compared to a whole new exhaust system. If you get a whole new one, it will give you a descent boost in HP, and sound even more aggresive. Its all about how much money you want to drop into it. I'd just start off with the muffler. Afterwards, if you arent satisfied, you can always get everything else too. Also, changing just the mufflers will not make you fail a safety inspection. If you get a whole new setup, it is legally required to have catalytic converters on it to drive it on the road. Hope this helps!
