did anyone do this to their muffler?

[Boxtaboy]

Originally Posted by clb0099

do you think i should add the bypass pipes as well? Maybe that added to the sound. What do you think boxtaboy ?

Honestly, if it's just for sound, I think the muffler modification is enough. A couple of weeks ago, I watched someone install the cat bypass pipes, but he kept his stock OEM muffler in place. There was virtually no sound increase after the install. Changing the muffler alone would've made a bigger sound difference. My Dansk exhaust with my factory cats in place was still louder than his setup.

Also, keep in mind that the cat bypass pipes are technically illegal to install (even if you pass emmissions testing), as altering your emmissions system in any way is not permitted, and carries serious fines if noticed. If all you are looking for is race car like sound, just buy a Borla, GHL, or B&B cat back exhaust. That'll do it.

Or, just modify your muffler to a bypass design. The sound will be noticeably different.

[clb0099]

so like my orginal post where the two pipes go into the tip is good enough? That isn't illegal is it? I am going to have the place look at my exhaust again and see what they can do.

[Boxtaboy]

Originally Posted by clb0099

so like my orginal post where the two pipes go into the tip is good enough? That isn't illegal is it? I am going to have the place look at my exhaust again and see what they can do.

Modifying your exhaust after the cats is fine, so your muffler mod is no problem. Changing the muffler itself is no problem either. As long as you don't mess with the cats, you're fine from the legal standpoint.

I am thinking your muffler shop didn't really do the muffler bypass correctly. If they actually made pipes that go from the pipe connecting the cat to the muffler tips, the sound increase would be definitely noticeable by you.

[clb0099]

i think the guy who did the work made have not welded it good enough i think i might have a leak in what of the points of contact. I will keep you posted on what happens.