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MHP header/ Slip in Silencer Inquiry

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Old Jan 22, 2011 | 03:56 PM
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MHP header/ Slip in Silencer Inquiry

I will repost my original question about the MHP headers and Slip in Silencer without linking to another sites Group Buy. Sorry about that again "Super".

1) Is the silencer that Superlubricity installed in his own car from MHP or his own fabrication?

2) Can I install the MHP headers/mid-pipes allow for 200 or 300 cell secondary cats? Will this method eliminate droning or the "too loud" factor?

3) Those who have installed the MHP headers...What do you guys think?

4) Superlubricity...Can I inquire with members here about pricing? I don't want to violate TOU or seem like I'm advertising. I just want to make sure a deal is a deal afterall.

Thanks Again!
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Old Jan 22, 2011 | 04:00 PM
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1. MHP
2. Yes, there will be some sound reduction as well as power. No one has ever claimed MHP droned.
3. Most people will say some version of "awesome or the best"
4. PM members who have the set - super, even money, harrower, etc or call.email MHP yourself.

where my dogs at?
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Old Jan 22, 2011 | 04:05 PM
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Originally Posted by GHAZAN
1. MHP
2. Yes, there will be some sound reduction as well as power. No one has ever claimed MHP droned.
3. Most people will say some version of "awesome or the best"
4. PM members who have the set - super, even money, harrower, etc or call.email MHP yourself.

where my dogs at?

Thanks Ghazan! I'm not too worried about a slight reduction of power as it appears they make quite a bit of power as it is already. You're right about people not complaining about the MHP droning, but they also never said it DON'T. That's why I'm wondering. I'm trying to gain as much power as possible, while maintaining some sort of civility. I'll inquire with those members about pricing. I was hoping to have an open dialogue about pricing as that usually allows for more feedback.

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Old Jan 22, 2011 | 04:07 PM
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that will probably be a TOS violation or get you suspended since talking about MHP is taboo as it is - keep to PM for pricing my best guess.
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Old Jan 22, 2011 | 04:10 PM
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Silencer info here -> https://mbworld.org/forums/c63-amg-w...aders-c63.html

Those were made by MHP. They are very similar to exhaust inserts available for other applications. Google "exhaust inserts" and you'll see how common this kind of silencer is for other applications.

These inserts are much quieter than running 200 or 300 cell cats, especially at start-up. They are like mini-mufflers.

I wouldn't say they are something you can quickly remove and replace because you have to take off the mid-pipes to pull them out. I'm working on my own solution with a local fabricator (using V-band clamps) so I can quickly swap them at the track.

Hope that helps.

As far as pricing to avoid any "advertising" I'd reach out as GHAZAN suggested to a few folks who have them.
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Old Jan 22, 2011 | 04:13 PM
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Originally Posted by superlubricity
Silencer info here -> https://mbworld.org/forums/c63-amg-w...aders-c63.html

Those were made by MHP. They are very similar to exhaust inserts available for other applications. Google "exhaust inserts" and you'll see how common this kind of silencer is for other applications.

These inserts are much quieter than running 200 or 300 cell cats, especially at start-up. They are like mini-mufflers.

I wouldn't say they are something you can quickly remove and replace because you have to take off the mid-pipes to pull them out. I'm working on my own solution with a local fabricator (using V-band clamps) so I can quickly swap them at the track.

Hope that helps.

As far as pricing to avoid any "advertising" I'd reach out as GHAZAN suggested to a few folks who have them.

Thanks Super!

I just want to clear up any questions about silencers vs. 200-300 cell cats. Is it one or the other? Which one would you recommend? What are the pros/cons for the silencers and 200-300 cell cat?

Thanks again
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Old Jan 22, 2011 | 04:24 PM
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Originally Posted by I am Jeff
Thanks Super!

I just want to clear up any questions about silencers vs. 200-300 cell cats. Is it one or the other? Which one would you recommend? What are the pros/cons for the silencers and 200-300 cell cat?

Thanks again
The inserts were made to use with the catless system. They are located in the same portion of the exhaust as the high-flow cat option so it's one or the other.

After hearing a car (nrgy's) with 300-cell cats it was just too loud for me. That is why I worked with MHP on an alternative. The inserts are much more civil. It is still very loud but much more tolerable than without.

Note: Cats certainly help the environment/air quality by reducing some emissions. You'll notice this right away if you go catless because your garage will smell like a gas station/race track; something you can't avoid when you go catless.
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Old Jan 22, 2011 | 10:17 PM
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I'm not sure why talking about a product's price would be a violation of the TOU. I understand there would be a violation if someone linked to a group buy to a non-sponsor/vendor or links to other website for discounted pricing, but for generic price questions, I wouldn't think there would be a problem

Pricing for MHP headers is on their website. You can probably negotiate better pricing if you call them directly. If you are concerned about sound, I suggest you wait until you get a chance to hear a few cars with headers in person or at least try to hear as many of them as you can on youtube.
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Old Jan 23, 2011 | 12:21 AM
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Try without cats or silencers. That's what I have now. The only "really loud" moments are cold starts and wot. Idle, and cruising are barely louder than stock, yet have a low bass rumble that stock doesn't have. You have to hear it to believe it. At mild throttle openings, below 3k rpm, the noise is equivalent to a Harley. I'd recommend giving the catless setup a go. A true cold start sounds like a space shuttle launch, but only for maybe 10 sec then idles down quite a bit.
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Old Jan 23, 2011 | 11:39 AM
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Originally Posted by Even Money
Try without cats or silencers. That's what I have now. The only "really loud" moments are cold starts and wot. Idle, and cruising are barely louder than stock, yet have a low bass rumble that stock doesn't have. You have to hear it to believe it. At mild throttle openings, below 3k rpm, the noise is equivalent to a Harley. I'd recommend giving the catless setup a go. A true cold start sounds like a space shuttle launch, but only for maybe 10 sec then idles down quite a bit.
This may just be personal preference, but I'm not a big fan of the idea of driving at 3k rpm and feeling like I'm driving a Harley. lol I'm going to try to listen to Dodgers and Petro's cars first and then go from there.
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Old Jan 23, 2011 | 02:44 PM
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Originally Posted by I am Jeff
This may just be personal preference, but I'm not a big fan of the idea of driving at 3k rpm and feeling like I'm driving a Harley. lol I'm going to try to listen to Dodgers and Petro's cars first and then go from there.
I agree. I actually dislike the sound of my car with catless headers when I'm not at the track. Far too aggressive for my taste. It's even worse when you are outside the car.
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Old Jan 23, 2011 | 06:25 PM
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Originally Posted by superlubricity
I agree. I actually dislike the sound of my car with catless headers when I'm not at the track. Far too aggressive for my taste. It's even worse when you are outside the car.
I actually don't need any more attention drawn to this car. lol I drive without front plates in NYC. NYPD would probably be drawn to the catless setup like flies to garbage. Once they write 1 ticket, a whole slew of tickets will follow. lol I like your setup right now, but not sure about having my garage smell like a gas station. Ohhhhh....the possibilities!
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Old Jan 23, 2011 | 06:38 PM
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Originally Posted by superlubricity
I agree. I actually dislike the sound of my car with catless headers when I'm not at the track. Far too aggressive for my taste. It's even worse when you are outside the car.
Though subjective, I find this comment very useful. As I stated in the past in your other threads, you and I seem to have the same noise attenuation requirements and I think this alone will sway me away from the LTs. Well, that and the Harley comment from Even Money.

Probably the best compromise for me will be going with K2 hardware.
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Old Jan 24, 2011 | 01:10 PM
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Originally Posted by I am Jeff
This may just be personal preference, but I'm not a big fan of the idea of driving at 3k rpm and feeling like I'm driving a Harley. lol I'm going to try to listen to Dodgers and Petro's cars first and then go from there.
I must admit as others have, cold start is brutally loud on this car with
catless tri-y/LT headers.

Every morning when I come out to start the car before I leave to work
I scan the neighborhood quickly and make sure no one is around for
fear of causing a heart attack.

For 10 to 15 seconds it sounds like a race car but once it idles it is
much more mellow with a slight muscle car rumble. WOT is also very
loud.

Driving around town is pretty normal, slightly louder than stock. As
long as you can resist continuous wot blasts you will not draw that
much attention. I do not have a front plate mounted either and
have yet to be pulled over by any law enforcement.
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Old Jan 24, 2011 | 01:24 PM
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Originally Posted by superlubricity
I agree. I actually dislike the sound of my car with catless headers when I'm not at the track. Far too aggressive for my taste. It's even worse when you are outside the car.
I agree. For me, the problem with catless headers -- in addition to the smell, which is nice but very strong -- is how loud the exhaust sounds outside of the car and that is relevant when you're driving next to people that don't want to be deafened by 110 db's (jk!, as I'm not sure how loud they actually are).

I started to feel bad that people might have their ears hurt if I stepped on the throttle too much.

But, I'll admit, if I had the money right now, I would be in the market for MHP LT's, in a second. And I would go the silencer route for daily driving.
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Old Jan 24, 2011 | 01:26 PM
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Originally Posted by PetroC63
I must admit as others have, cold start is brutally loud on this car with
catless tri-y/LT headers.

Every morning when I come out to start the car before I leave to work
I scan the neighborhood quickly and make sure no one is around for
fear of causing a heart attack.

For 10 to 15 seconds it sounds like a race car but once it idles it is
much more mellow with a slight muscle car rumble. WOT is also very
loud.

Driving around town is pretty normal, slightly louder than stock. As
long as you can resist continuous wot blasts you will not draw that
much attention. I do not have a front plate mounted either and
have yet to be pulled over by any law enforcement.
This could be a commercial.
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Old Jan 25, 2011 | 03:16 PM
  #17  
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Originally Posted by superlubricity
The inserts were made to use with the catless system. They are located in the same portion of the exhaust as the high-flow cat option so it's one or the other.

After hearing a car (nrgy's) with 300-cell cats it was just too loud for me. That is why I worked with MHP on an alternative. The inserts are much more civil. It is still very loud but much more tolerable than without.

Note: Cats certainly help the environment/air quality by reducing some emissions. You'll notice this right away if you go catless because your garage will smell like a gas station/race track; something you can't avoid when you go catless.

Does NRGY have any videoclip of his car? I want to hear a MHP car whit catted midpipes.
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Old Jan 25, 2011 | 03:22 PM
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Originally Posted by 87C63
Does NRGY have any videoclip of his car? I want to hear a MHP car whit catted midpipes.

+1 on that. I want to hear how his 300 cell cat MHP pipes sound like.
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Old Jan 25, 2011 | 03:25 PM
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Here are a few for comparison.

Nrgy has cats.
Avenger
and super are catless.
cek
is stock.

http://www.youtube.com/watch?v=lOqfULnFAig <- cek (spinning) and nrgy

http://www.youtube.com/watch?v=6RaNBOM53sw <- nrgy

http://www.youtube.com/watch?v=MZTn26KlRCs <- superlubricity and cek

http://www.youtube.com/watch?v=Dj2XDBZOSjc <- avengerboater and superlubricity
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Old Jan 25, 2011 | 03:35 PM
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Just from my experience, I would say to go ahead with super's silencer option, it's going to be quieter than most if not all cat options. His method will be easier if you want to track the car..

I'll make an effort to see if I can get some in car video/audio driving around to hear how my setup, no cats, sounds.. Honestly, outside of the cold starts and WOT, it's not much more than stock.
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