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Discussion Starter · #1 ·
300C with Magnaflows video/audio clip!

I went to my exhaust shop today and played around. The 300C exhaust basically goes like this: header - collector - big cat - small cat - x pipe - resonator - muffler - tip. We tried just yanking the resonator: louder, but still not mean sounding: too tinny. Thought about yanking the mufflers completely, but thought it might sound too raspy, so decided on some small Magnaflow stainless mufflers and some nice slash cut chrome tips. The Magnaflows fit in there great, but needed to be angled a bit to fit well in the space left by the stockers.

Here's a clip. We'll probably crush my little server at some point, so a backup host would be appreciated. 300C Magnaflow Video

Impressions. . . it's loud. Not obnoxious, but definitely takes the refinement of the car down about 5 notches. Everyone definitely looks when it starts and revs. Inside the car it's not terrible, but is a bit annoying. You can clearly hear when MDS kicks on and off and it can get on your nerves. I like it for now, but wouldn't suggest it if you want to keep the "silent cruiser" feel.

The Magnaflow muffs definitely deepen the sound a bunch. With the stockers, it was high pitched and raspy. With the 'flows, it's much more mellow and rumbly.

Enjoy.

fathemi
 

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Fathemi,
Sounds cool but a bit more than Im looking for. what would you suggest to beef it up without getting so radical?


Steve K
05 300c (friday 6/25)
03 conv. vette - VETTTISH
02 tahoe

PS. Just came back from the dealer tonight, he just took delivery of my Black 05 - Loaded with all the toys including the moonroof! Picking her up on friday 4pm after they finish tinting up the windows
 

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300C pipes

That thing sounds mean as hell. If someone pulls up beside you and you give them that sounds, they will decide to let you go right ahead.
 

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Sounds Good.
 

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Discussion Starter · #7 ·
rbb400 said:
Fathemi,
Sounds cool but a bit more than Im looking for. what would you suggest to beef it up without getting so radical?
There are a couple possible setups, including ones that have been documented already by other folks in this forum.

Personally, I think it would sound interesting to leave the resonator (my terminology: some folks transpose resonator and muffler. . . in my diagram, there is one resonator and two mufflers) in place (helps a lot with the MDS balance) and just either nuke the mufflers entirely (the "attydude" mod) or stick some small Magnaflows in there. That would probably sound pretty good.

As soon as you nuke the resonator, I'm sure you'll experience the MDS issue, even if you leave the stock mufflers in place (ala the "Tibbs" mod).

Someone will inevitably ask the power question. Yes, it feels a bit more powerful, especially high end. No, I don't think it's much. . . not a mod to do and expect to really feel the power difference.

fathemi
 

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As posted earlier and depicted below, We removed the rear resonaters/mufflers. And we are satisified with the modification and almost certainly would do it again. If nothing else, we lost about 40 lbs of weight and I think the stock tips are too small. Ron

 

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I'm off the week of the 4th and will be taking mine in to have the rear resonators/mufflers cut off. I will drive it around first to see if the right sound for me is there, if not, I may have some sort of bullet style mufflers put in. I'll probably stay with the 3 inch tips though. I should be able to post what I did and my impressions towards the end of that week. I might also try to fab some kind of CAI if I can get a day to thoroughly check things out around the stock airbox.
 

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I did mine today like attydude. Matter of fact I took his pic to the shop to show them what I wanted-Thanks attydude!. I put 3.5" tips. Sounds great, nice and deep.
 

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It's too loud for the car, at least for daily duty ......
Sounds like a good idea for a removable set up tough ....
Seeing the accesibility on the 300C mufflers it would not be a bad idea to set up a removable type exhaust ....... a few years back a friend and I did this for his car where with just 4 "quickclamps" and a jack you could swap out the exhaust in minutes, and exchange to go to a Cat-less, 3-inch, straight mufflers system, to be used on cruise nights .... at the track it was also a breeze to remove everything for all-out power ... (it was a turbo 6-cyl Supra ...)
 

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Discussion Starter · #12 ·
PR300C said:
It's too loud for the car, at least for daily duty ......
Sounds like a good idea for a removable set up tough ....
Seeing the accesibility on the 300C mufflers it would not be a bad idea to set up a removable type exhaust ....... a few years back a friend and I did this for his car where with just 4 "quickclamps" and a jack you could swap out the exhaust in minutes, and exchange to go to a Cat-less, 3-inch, straight mufflers system, to be used on cruise nights .... at the track it was also a breeze to remove everything for all-out power ... (it was a turbo 6-cyl Supra ...)
It's loud for sure, but not bad at all inside the car. It would be perfect if MDS didn't kick in on the freeway and give it the ricer drone. :) I'll probably experiment with it a bit. The coolest set up I've seen is electronic dumps. . . push a button: loud as hell, push it again: absolutely stock quiet. I might do that on the C someday.
 

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Nice Idea FatHemi ... you just reminded me that I looked into that a while ago ....
Enjoy ...
Sound of a GN
Exhaust Cutout

Here is a site that sells them in big sizes 2.5, 3.0, 3.5 ....
A possible seller

PS. I have nothing to do with this site .... I looked for it for my Eclipse GS-T, but went with a 2.5 Down pipe, 3 "cat, 3"catback ..... Sorry not LX related.
 

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catalytic converter?

vengra said:
I did mine today like attydude. Matter of fact I took his pic to the shop to show them what I wanted-Thanks attydude!. I put 3.5" tips. Sounds great, nice and deep.
isn't there a catalytic converter to worry about? i mean passing smog pollution tests.
 

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We don't have smog tests in MN. As far as I know it's just the resonators which control the sound. Look under the trunk, it's those two 30lb tin boxes.
 

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I read about an exhaust from Ford Racing for the Mustang FR500. It had (I think) a spring loaded gate that only opened under hard throttle. Just cruising around it was quiet, but when you mashed the throttle the excess pressure would open the gate to allow for a lot of flow and a mean sound.
 

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Discussion Starter · #18 ·
Yeah, the FR500 catback was nice. Kind of a compromise system, but cool idea.

Those worried about the cats, don't. They're closely coupled to the header collector and aren't touched in any of the exhaust mods that we've been talking about here.

For those interested, I'm currently designing a new exhaust for the 300C that may or may not incorporate the stock 2-in 2-out center resonator. I'm putting together a Magnaflow Tru-X X-pipe with some QTP electric cutouts and some Magnaflow muffs. In one position, the exhaust will flow straight through the mufflers for the sound (approx.) that you hear in the video clip (LOUD and mean!). In the other position, the exhaust will flow through another muffling device (either long glasspacks or the stock resonator) before going through the rear Magnaflows. That will make it stock-quiet with a little more mellow (less raspy) sound due to the Mags. It will end up in the $500 range, but should be pretty sweet. I'll keep us posted.

fathemi
 

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fathemi said:
I went to my exhaust shop today and played around. The 300C exhaust basically goes like this: header - collector - big cat - small cat - x pipe - resonator - muffler - tip. We tried just yanking the resonator: louder, but still not mean sounding: too tinny. Thought about yanking the mufflers completely, but thought it might sound too raspy, so decided on some small Magnaflow stainless mufflers and some nice slash cut chrome tips. The Magnaflows fit in there great, but needed to be angled a bit to fit well in the space left by the stockers.

Here's a clip. We'll probably crush my little server at some point, so a backup host would be appreciated. 300C Magnaflow Video

Impressions. . . it's loud. Not obnoxious, but definitely takes the refinement of the car down about 5 notches. Everyone definitely looks when it starts and revs. Inside the car it's not terrible, but is a bit annoying. You can clearly hear when MDS kicks on and off and it can get on your nerves. I like it for now, but wouldn't suggest it if you want to keep the "silent cruiser" feel.

The Magnaflow muffs definitely deepen the sound a bunch. With the stockers, it was high pitched and raspy. With the 'flows, it's much more mellow and rumbly.

Enjoy.

fathemi
Had mine done with flowmasters and it sounds great.
 

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PR300C said:
Sounds like a good idea for a removable set up tough ....
Seeing the accesibility on the 300C mufflers it would not be a bad idea to set up a removable type exhaust ....... a few years back a friend and I did this for his car where with just 4 "quickclamps" and a jack you could swap out the exhaust in minutes, and exchange to go to a Cat-less, 3-inch, straight mufflers system, to be used on cruise nights .... at the track it was also a breeze to remove everything for all-out power ... (it was a turbo 6-cyl Supra ...)

Doesn't sound like a set up for a white boy.. LOL
 
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