tarponman

I just purchased a megan axle back exhaust for my is350. I am not looking for any HP gains just a little sound.


Can someone explain to me what a mid pipe does? I did not buy one but I am wondering if I should.

Does it increase loudness?

06isDriver

it will make it louder and gain 1-2 whp


so did you or did you not purchase the mid pipe?

tarponman

No I did not purchase the mid pipe.

All I bought was the axle back.

I guess I'll install it and see if I am satisfied with the loudness.

Raralith

The mid-pipe is the pipe after the catalytic converter and the right before the mufflers. Aftermarket mid-pipe's focus on relieving back pressure from the engine, and a mid-pipe will make your car louder. I have the Joe Z full catback and it is, in my opinion, considerably louder than stock but this replaces everything from the headers back compared to axle backs.

brociouz

iTrader: (65)

It makes your exhaust louder, particularly in the midrange when an axle-back exhaust generally tapers off. Here are some sound clips: https://www.clublexus.com/forums/per...a-midpipe.html

The downside is considerably more drone at highway speeds, and it's illegal in some states like California.

Kurtz

iTrader: (1)

It's illegal in all 50 states actually since it's a federal law you are violating.

It's just that some states don't do inspections where they check it.

brociouz

iTrader: (65)

Is that the law where it says you can't remove ANY working catalytic converter? Even if you're replacing it with a different one (as in the case with Megan midpipes)?

shadowman

iTrader: (2)

I believe so. You are not allowed to modify or replace a working Cat. I remember reading this on Turbo Magazine.

But if it was somehow damaged by a parking curb or roadkill, then you are allowed to replace it.

brociouz

iTrader: (65)

^ Yeah, come to think of it I'm pretty sure a rat chewed through my OEM midpipe so I just HAD to get the Invidia. I'm so screwed when I have to go in for a smog check LOL.

Kurtz

iTrader: (1)

Yup. But even if it were damaged you'd have to (legally) replace it with another working cat, not a midpipe.