Greetings,

On my 2004 G35X Sedan I have installed both test pipes and a Megan Racing Y-Pipe. Now, I need to finish off the back end of my exhaust, I have been told that a Megan Racing Catback wouldn't fit because I need an axle-back(?). But if I am not mistaken, an axle-back is just a muffler and I need a catback (primarily because I don't want to buy HFC's yet). So I request your assistance. What should I do from the Y-Pipe -> back? Again, I need at least a cat to pass my Emissions Test.

Oh, and let's try to keep this in a reasonable price range.

Thanks a bunch!

 

This is a bit confusing.

You have already replaced your catalytic converters with test pipes yet you want advice for exhaust after the y-pipe that uses a catalytic converter.

 

Yes. It's not that difficult to understand, that is what I said. Either be helpful or don't post at all.

 

It's a bit confusing because it doesn't make a lot of sense.

A cat-back system is everything behind the catalytic converters. You were probably told a cat-back won't work because you already have the Megan Racing Y-pipe, which would be included in a cat-back system. You could buy one if you want, but you'd have to replace your current y-pipe to use it.

Now, regardless of whether you decide to go cat-back or axel-back, you're still going to run into the issue of not having cats. You don't really have a choice; if you want cats, then you're going to have to remove the test pipes.

Let me ask you this, which I believe is what Phontain was alluding to; why did you install test pipes in the first place if you still want to have cats further down in the system?

 

The only exhaust that offers what you want (a HFC after the y-pipe) is made by Motordyne. It's not a full exhaust, but you would buy their XYZ Pipe (a y-pipe that allows you to use any 3 of their accessories, hfc, straight pipe, or resonated pipe). Then you would get whatever mid pipe and axle back you want.