Mine never broke in. Then again I had a non resonated exhaust, tons of rasp. I switched over to a Litespeed exhaust which has 3 large resonators on it, no more rasp, nice deep sound.

That thing sounds beast!


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The headers were used, so they might already be broken in. My FI CBE is non-res, so I expected rasp. I honestly just did not want to wait 6 months or however long it is for a new one, so I bought used. I'm going to put an order in for a resonated one after I get the suspension brakes and oil cooler squared away, and just sell this one on the forums. I love the sounds, its brutal and in your face, and at the same time its not obnoxious like people with fart pipes. From the 2 days I had it on the road, I turned a lot of heads. I was stopped in traffic under an over pass and a mustang GT was next to me... He revved his engine a little, so i took her up to 3500 RPM. He went higher, so I hit my rev limiter in at 5k. He smiled and gave a thumbs up, and i gave him a nod. Meanwhile a scion behind us was tacking his sh*t out lol. So I took it right to 7k... Should have seen the mustang drivers face. We were both smiles from ear to ear. I am guessing he thought my 5k rev was the max... Anyway, aside from the who's penis is larger thing, I feel very accomplished doing the install myself. I am not bad at mechanical stuff, just no real experience, until now, with auto.

Very huge shout out to all those who helped me through this. Without the support of you all, I probably would have given up.

To those reading this thread, thinking about doing the install yourself... Be warned, its not an easy task. But I believe with enough time, patients, and willpower, it can be done by almost anyone who is willing to get a little dirty, scarred, and discouraged. If you have the time, and tools i say go for it! You will curse me once you get to the hard stuff, but will be like "that Alex guy was right" once you get it done.

You could just buy some 2.5" resonators and have welded in. Summit racing sales a bunch of different brands and sizes... Vibrant makes some good stuff...
That way you don't have to wait another 4 months for another exhaust.

Give Tony a call about just buying a resonated section. When I got my non-res he said something about just getting a resonated section if I deemed the LTH and non-res combination too loud.

MJB, sound clips? I'm running Momentum headers, Test pipes and my litespeed exhaust should be here by the end of the week.....I wanna hear what it sounds like! Pretty please :D

Good ideas! Never really thought about that.

Got a test drive in today! I was shocked with how much quieter the exhaust sounds now after the M370 install... It was almost disappointing :-( But i finally realized what was going on. On the outside the exhaust sounds the same. I figure it had something to do with the resonant frequency inside the car being changed from the new manifold. It sounds so much smoother now under load. Literally sounds like im breaking into lambo territory with the exotic sound it makes. I did a few pulls, and it felt like the the bottom end was a lot beefier

That makes 0 sense to me, lol...
I know it changes the sound, but it's really minute

At the same time, I just hope you enjoy the setup, I know you put a SHÍTLOAD of time into it

Let me put it this way, it is the same volume, but it is much smoother now. So it makes it seem a lot quieter. If that makes any sense :-P You know that sound you get sometimes if the window is down just at the right spot, and makes a wobbling sound, and makes it feel like your ears are going to explode? Well imagine that before the install, and now i rolled the window up an inch. It is still just as loud, just different...

Took the car to work yesterday, and the people in the office could hear me start it and take off, from the 6th floor :-P

Lol. My Wife tells me my dog can recognize my car from 2 blocks away.

Hehe yep, if my car is outside I vibrate pictures on the wall of my friend's house 5 houses down. I've also stepped on it pulling out of my neighborhood and my buddy Joey could hear it, sitting in his house with the windows open.

He lives in another neighborhood :bowrofl:


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Well this should be interesting for me with the lite speed exhaust as it has no mufflers..... LOL! Not to mention in live in a valley that ECHOES EVERYWHERE! Damn, the 3 apartment complexes around me sure are going to hate me. Too bad Patrick@litespeed sent my exhaust parcel (which I specifically asked him not to) so its going to take about a month or longer to get here....

Car is at the shop this week. Can't wait for the tune and dyno results!!