Chrysler 300M Enthusiasts Club
  • Which exhaust of these two?

  • Talk about the most common LH mod, and why Chrysler didn't do it.
Membership Banner

Talk about the most common LH mod, and why Chrysler didn't do it.

Moderator: Moderators

 #301788  by xyth
 March 19th, 2013, 1:26 am
Planning on picking up the dual stainless exhaust from Trubendz this week.
http://www.mandrelexhaustsystems.com/se ... UAL/Detail

Goal: Deep and smooth sound, no rasp, least amount of drone, loud but not obnoxiously loud.

Wondering what the best set up would be as far as getting rid of the front/first resonator.
1) Replace it with 2 x 2.25 in, 2.5 out Magnaflow muffler.
-or-
2) Replace it with Magnaflow y-pipe into a Magnaflow straight through resonator.

I'm thinking the first option may be easier and cheaper, what is your guys' opinion?

Here's some visuals...
Setup 1:
Image
Setup 2:
Image
User avatar
 #301793  by 300maximilien
 March 19th, 2013, 8:00 am
That's an interesting find there that you found. I did not know anyone made a bolt on dual outlet exhaust for the LH cars.

If I were you I would go for your option 1. This should eliminate the highway droning many complain of when doing something like option 2.
 #301816  by Shadowvox6
 March 19th, 2013, 10:01 am
If it were me, I would do neither.
Do a custom true dual exhaust with:
1st Gen 3.5L Exhaust Manifolds
Magnaflow 2.25" Hi-Flo Spun Catalytic Converters
Magnaflow X-pipe
Magnaflow 2.25" mufflers at the rear, and some nice tips to go on the end.

Will wake up the beast in your 3.5L....increased exhaust flow, increased HP, and torque.
 #301833  by YesImLDS
 March 19th, 2013, 11:26 am
shadowvox6 wrote:If it were me, I would do neither.
Do a custom true dual exhaust with:
1st Gen 3.5L Exhaust Manifolds
Magnaflow 2.25" Hi-Flo Spun Catalytic Converters
Magnaflow X-pipe
Magnaflow 2.25" mufflers at the rear, and some nice tips to go on the end.

Will wake up the beast in your 3.5L....increased exhaust flow, increased HP, and torque.
Some people just want a nice sounding exhaust and not a bank loan.
User avatar
 #301838  by InfernoLime
 March 19th, 2013, 11:44 am
YesImLDS wrote:
shadowvox6 wrote:If it were me, I would do neither.
Do a custom true dual exhaust with:
1st Gen 3.5L Exhaust Manifolds
Magnaflow 2.25" Hi-Flo Spun Catalytic Converters
Magnaflow X-pipe
Magnaflow 2.25" mufflers at the rear, and some nice tips to go on the end.

Will wake up the beast in your 3.5L....increased exhaust flow, increased HP, and torque.
Some people just want a nice sounding exhaust and not a bank loan.
Lol. I have the stock single setup, except I put a straight pipe in the place of the muffler. (Still have the two resonators.) I very happy with the sound and it was pretty cheap

But if you want the duals, I say the first one because of the highway drone.
 #301877  by Shadowvox6
 March 19th, 2013, 3:04 pm
YesImLDS wrote:
shadowvox6 wrote:If it were me, I would do neither.
Do a custom true dual exhaust with:
1st Gen 3.5L Exhaust Manifolds
Magnaflow 2.25" Hi-Flo Spun Catalytic Converters
Magnaflow X-pipe
Magnaflow 2.25" mufflers at the rear, and some nice tips to go on the end.

Will wake up the beast in your 3.5L....increased exhaust flow, increased HP, and torque.
Some people just want a nice sounding exhaust and not a bank loan.
Doesn't take a bank loan...
You can substitute parts as you wish...I was using Magnaflow as an example.
My entire system was ~ $400 - installed
User avatar
 #301892  by 300maximilien
 March 19th, 2013, 4:29 pm
Tom can you post info on parts used? 2 manifolds, 2 mufflers, 2 cats and an x pipe plus labor for $400 seams like an unbelievable price!!

When I did the Hujo style on my first '00 M it cost me about $400 12 years ago for 1 muffler, custom bent pipes and 2 tips with labor.
User avatar
 #301893  by 300maximilien
 March 19th, 2013, 4:33 pm
I'd bet my left nut Tom's setup doesn't give anymore Hps than a Hujo design. From what I read an engine like this needs a certain amount of backpressure to do its job properly. Hard to prove without doing a dyno after each mod installation.
User avatar
 #301902  by alandw
 March 19th, 2013, 5:42 pm
I agree with Craig. I would go with option 1 for best sound and interior quiet.

Sent from my ADR6400L using Tapatalk 2
User avatar
 #301949  by Chrysler1924
 March 20th, 2013, 2:26 am
YesImLDS wrote: Some people just want a nice sounding exhaust and not a bank loan.
Pahahaha! Excellent. Needed that laugh...
User avatar
 #301950  by Chrysler1924
 March 20th, 2013, 2:30 am
mattgendron wrote:Lol. I have the stock single setup, except I put a straight pipe in the place of the muffler.

But if you want the duals, I say the first one because of the highway drone.
So if I understand you correctly, all you did was remove the stock muffler for some straight pipe? I've been thinking about doing that but thought it might "buzz" or drone real bad.
User avatar
 #301952  by InfernoLime
 March 20th, 2013, 6:04 am
Chrysler1924 wrote:
mattgendron wrote:Lol. I have the stock single setup, except I put a straight pipe in the place of the muffler.

But if you want the duals, I say the first one because of the highway drone.
So if I understand you correctly, all you did was remove the stock muffler for some straight pipe? I've been thinking about doing that but thought it might "buzz" or drone real bad.
Honestly it isn't too bad. I will try to take a video today but probably won't capture it. I find that above 2500 it almost doesn't sound different. But under that it has a nice growl when you push the gas. Idle is almost the same.

It is not 'ricey' at all. To put it in perspective, my mom and girlfriend both said it was 'not that bad'. :lol:
 #301974  by Shadowvox6
 March 20th, 2013, 10:41 am
300maximilien wrote:I'd bet my left nut Tom's setup doesn't give anymore Hps than a Hujo design. From what I read an engine like this needs a certain amount of backpressure to do its job properly. Hard to prove without doing a dyno after each mod installation.
I wouldn't make that bet if I were you.
I do know that torque was improved dramatically.
Any increase in flow, will increase scavenging, and help free up some HP.
 #301975  by Shadowvox6
 March 20th, 2013, 10:43 am
300maximilien wrote:Tom can you post info on parts used? 2 manifolds, 2 mufflers, 2 cats and an x pipe plus labor for $400 seams like an unbelievable price!!

When I did the Hujo style on my first '00 M it cost me about $400 12 years ago for 1 muffler, custom bent pipes and 2 tips with labor.
2 1st Gen LH manifolds
2 Magnaflow Spun Hi-Flow Converters
1 Flowmonster X-pipe
2 Thrush Welded Mufflers
2 4" resonated exhaust tips
User avatar
 #301976  by 300maximilien
 March 20th, 2013, 11:14 am
I'm not picking on ya Tom, but is this fair to say...


2 1st Gen LH manifolds - $??
2 Magnaflow Spun Hi-Flow Converters $100 each?
1 Flowmonster X-pipe $40
2 Thrush Welded Mufflers $40 each?
2 4" resonated exhaust tips $30 each

That's $350 in parts not including mani's and labor...

Also this is a great explanation on back pressure. I am no expert, but everything I read points to the same conclusion. Unless you are getting more fuel in there is not much gain to reduced back pressure. And with modern engines unless you can alter the fuel program you can actually reduce power.
Every naturally aspirated 4 stroke gasoline or methanol engine will run it's best with no back pressure. Any automotive engineer or racing engine builder will confirm that.

The problem is, virtually all carburetors and fuel injection systems were designed for engines that are muffled and have some back pressure. The result is many times when back pressure is reduced or eliminated the fuel curve is disturbed and the engines often loose low end torque because of the mismatched lean fuel curve. A simple jet change many times wont correct this. It requires a completely new fuel curve that is beyond most people's capability. This results in many people believing some back pressure is necessary,

There are no mufflers or back pressure on professional racing cars like F-1, NASCAR or NHRA.

A small amount of back pressure does not hurt performance much and it is impossible to dampen the exhaust noise without a little restriction (back pressure) so any street car will have some back pressure.
Of course this info is only as good as it's source. And could only be 100% if before and after DYNOs are done at each power adder step.
 #301984  by Shadowvox6
 March 20th, 2013, 12:36 pm
300maximilien wrote:I'm not picking on ya Tom, but is this fair to say...


2 1st Gen LH manifolds - $??
2 Magnaflow Spun Hi-Flow Converters $100 each?
1 Flowmonster X-pipe $40
2 Thrush Welded Mufflers $40 each?
2 4" resonated exhaust tips $30 each

That's $350 in parts not including mani's and labor...

Also this is a great explanation on back pressure. I am no expert, but everything I read points to the same conclusion. Unless you are getting more fuel in there is not much gain to reduced back pressure. And with modern engines unless you can alter the fuel program you can actually reduce power.
Every naturally aspirated 4 stroke gasoline or methanol engine will run it's best with no back pressure. Any automotive engineer or racing engine builder will confirm that.

The problem is, virtually all carburetors and fuel injection systems were designed for engines that are muffled and have some back pressure. The result is many times when back pressure is reduced or eliminated the fuel curve is disturbed and the engines often loose low end torque because of the mismatched lean fuel curve. A simple jet change many times wont correct this. It requires a completely new fuel curve that is beyond most people's capability. This results in many people believing some back pressure is necessary,

There are no mufflers or back pressure on professional racing cars like F-1, NASCAR or NHRA.

A small amount of back pressure does not hurt performance much and it is impossible to dampen the exhaust noise without a little restriction (back pressure) so any street car will have some back pressure.
Of course this info is only as good as it's source. And could only be 100% if before and after DYNOs are done at each power adder step.

I won't say what I spent on the parts, but you are partially accurate.
As far as back pressure, all my years of experience tells me that street cars need some back pressure to run optimally.
My system has back pressure....anything in the system (ie: catalytic converters, bends, mufflers) create back pressure.
I will say this....the two best mods I have ever done to my car are the high stall torque converter, and the 1G exhaust manifolds, without question.
 #301987  by YesImLDS
 March 20th, 2013, 12:57 pm
shadowvox6 wrote:
300maximilien wrote:I'm not picking on ya Tom, but is this fair to say...


2 1st Gen LH manifolds - $??
2 Magnaflow Spun Hi-Flow Converters $100 each?
1 Flowmonster X-pipe $40
2 Thrush Welded Mufflers $40 each?
2 4" resonated exhaust tips $30 each

That's $350 in parts not including mani's and labor...

Also this is a great explanation on back pressure. I am no expert, but everything I read points to the same conclusion. Unless you are getting more fuel in there is not much gain to reduced back pressure. And with modern engines unless you can alter the fuel program you can actually reduce power.
Every naturally aspirated 4 stroke gasoline or methanol engine will run it's best with no back pressure. Any automotive engineer or racing engine builder will confirm that.

The problem is, virtually all carburetors and fuel injection systems were designed for engines that are muffled and have some back pressure. The result is many times when back pressure is reduced or eliminated the fuel curve is disturbed and the engines often loose low end torque because of the mismatched lean fuel curve. A simple jet change many times wont correct this. It requires a completely new fuel curve that is beyond most people's capability. This results in many people believing some back pressure is necessary,

There are no mufflers or back pressure on professional racing cars like F-1, NASCAR or NHRA.

A small amount of back pressure does not hurt performance much and it is impossible to dampen the exhaust noise without a little restriction (back pressure) so any street car will have some back pressure.
Of course this info is only as good as it's source. And could only be 100% if before and after DYNOs are done at each power adder step.

I won't say what I spent on the parts, but you are partially accurate.
As far as back pressure, all my years of experience tells me that street cars need some back pressure to run optimally.
My system has back pressure....anything in the system (ie: catalytic converters, bends, mufflers) create back pressure.
I will say this....the two best mods I have ever done to my car are the high stall torque converter, and the 1G exhaust manifolds, without question.
I don't doubt you but depending on the 300m you putting this much into the car unless it is your baby there is no point for the average driver to spend a grand on this kind I'd set up. If you got $400 great for you but anybody else would be lucky to get this custom exhaust for $700-$1000+ depending on the shop. It just isn't feasible to look at it and see it as a smart investment from my viewpoint
User avatar
 #302040  by Brando26
 March 20th, 2013, 5:47 pm
Its a labor of love. Most people doing mods like that don't plan to resell. Toms car is ridiculous in a good way. Was riding with him in Indianapolis once and the car barked 2nd while driving. Mine never did that no matter what performance mods I had...

Sent from my SPH-L710 using Tapatalk 2
User avatar
 #302060  by 300maximilien
 March 20th, 2013, 7:46 pm
brando26 wrote: the car barked 2nd while driving. Mine never did that no matter what performance mods I had...
Both Specials I have owned did this stock in A/S.
 #302106  by xyth
 March 20th, 2013, 10:08 pm
So general consensus is setup 1 will serve me best as far as sound and drone then?

I appreciate the input as far as true duals go shadowvox, but I just don't think it's in the cards right now. Any input as far as these two setups go though? It seems like there wont be much difference between them, but Id like to hear your opinion.

Thanks everyone else for the input as well!