GHL vs M&K

[nkotselas]

Hello everyone

After months of looking for an M&K muffler without success, I finally settled on a used GHL. Now that I just received the GHL there is a M&K is available. (sucks right? )


I was hoping to get opinions on which you guys liked, mine will be 1in 1out, but all opinions are welcome. I am primarily interested in performance then sound. The weight of the M&K is also a plus.

And after hours of looking I was only able to find a few videos featuring a ghl exhaust on 3.2s. If anyone has got a video/soundclip of these that would be awesome!

Thanks in advance

[nkotselas]

Bump! Any opinions on either please!

[KFC911]

Nick, I have no experience with the M&K (not available back then), but I've had a GHL 1in/1out on mine for years and have been very pleased. I've also got a Fabspeed euro premuffler (added later, with no noticable change in tone imo), along with a SW chip. Although I've had my car on a dyno, I can't say how much the GHL alone does, but my car performs great, and I get a big thumbs up all the time from others on how my car sounds and I love it. Not too loud with no resonance whatsoever. Sorry...no vid/audio clips.

Keith

[nkotselas]

Thanks! May I ask what the dyno numbers were? I have a SW chip and will install a premuffler at the same time as the muffler. It would be good to see what others with the same setup are getting.

Thanks

[bkreigsr]

M&K is light for a reason. They are almost without any inside baffles. It follows that are are also very loud. People with M&K get used to driving with no radio, as the sound waves bounce around the cabin and change the sound of everything being transmitted or reproduced.
That being said, the same people, myself included, also get their kicks from listening to the flat six churn out its own melody. I was able reduce the dB's a bit by making a pair of baffles (per Ben's suggestion) to slide into the tips (removable at the track). Probably reduced it by only 2-3 dB, but just enough so that I can now start the car in the driveway or garage and not have all the neighbor's pulling back their curtains to see whats going on.
Bill K
edit - it's 1 in 1 out, with cat delete, GT3 model
...and the baffles eliminated the drone between 2,800-3,200

[KFC911]

Originally Posted by nkotselas

Thanks! May I ask what the dyno numbers were? I have a SW chip and will install a premuffler at the same time as the muffler. It would be good to see what others with the same setup are getting.

Thanks

Nick, I don't have the numbers handy, and it's kind of pointless to do comparisons like that anyways...TOTALLY pointless actually. Different dyno types (mine are from a Mustang dyno), different days, etc. I did mine years ago, along with a bunch of other Pelicans, and there are threads in the archives if you care to search. This was back during the infamous "chip wars" (hi Loren, hope you are doing well if you read this ), and I had one specific purpose in mind, to compare the SW vs '88 stock chips. Before you ask, everyone there agreed there was no discernable diference in the HP/Torque curves between my six dyno runs at WOT (swapping the chips back and forth between runs). That said, my car produced ideal curves, and stacked up favorably with some other cars that day (a new 3.6 and a hot-rod 3.5 twin plugged MFI for example) and everyone was commenting about how good the GHL sounded. Hope this helps...

Keith

[Revvin 911S]

I have a M&K one in one out with a M&K pre muffler on my 3.2 and love it. I haven't done any dyno runs so I don't have exact numbers for you, but it saved some weight and sounds great. I think the sound at WOT is just awesome.
I have seen a few people on the board talk about how loud the M&K is and I have to say, at least with my set up, I don't think its really that loud. When starting the car up or at idle it seems only slightly louder than stock, and certainly not obnoxiously loud. Same thing when just cruising around town or on the road. I haven't noticed any annoying drone and I have no problem hearing the radio or holding a conversation (well at least no more problem then in any other old 911 I've ever been in. No matter what these cars aren't exactly quiet ). The only time I really notice it being "loud" is at WOT, and it should be loud then. Different people have different tolerances for "loud" exhaust, but don't count M&k out on that reason alone. Have fun making your decision, hopefully you end up loving whatever it is you go with

[nkotselas]

Thanks everyone!

I don't mind it being loud at all, as long as the neighbors don't complain. I'm sure because it is a 1in 1out it will be bearable. I am considering buying both and trying them out, and keeping my favorite but money is short these days so I've got to get great prices which is hard..

[bklyn]

I love my Fabspeed, one in dual out. Yes its loud but I like my engine sound better than my radio, and as for the neighbors I belive most of them are envious!

[nkotselas]

Thanks for your input! I will take a look at fabspeed as well.

Are these all considered "sport mufflers"? Or is that just the two out muffler? I've always been a bit confused by that. I still haven't seen dyno charts for m&k or many other brands. I don't mind if the inncrease isn't much. I just want to make sure I don't go the wrong way!

[KFC911]

Originally Posted by nkotselas

... I'm sure because it is a 1in 1out it will be bearable.....

I agree...I think most of the issues are with those with a 2 involved (in or out).

Originally Posted by nkotselas

...Are these all considered "sport mufflers"?...
I just want to make sure I don't go the wrong way!

Yes indeed...I don't think you'd go wrong with any of them...just personal preference for what you like.

ps: You're looking for performance gains, and Porsche didn't leave much on the table for the 3.2s hp increases without getting $pendy. Losing weight is "cheap hp"...I've easily dropped 150+ lbs on Miss Piggy, and that's worth approx 1 hp for every 10 lbs dropped...accelerating, handling, and stopping.

pps: I've also refreshed/upgraded the suspension on the "old girl" talk about a car transformation...THATS where it's at imo . Have fun...I know I have!

[nkotselas]

ps: You're looking for performance gains, and Porsche didn't leave much on the table for the 3.2s hp increases without getting $pendy. Losing weight is "cheap hp"...I've easily dropped 150+ lbs on Miss Piggy, and that's worth approx 1 hp for every 10 lbs dropped...accelerating, handling, and stopping.

pps: I've also refreshed/upgraded the suspension on the "old girl" talk about a car transformation...THATS where it's at imo . Have fun...I know I have!

You read my mind, the weight of the M&K will always be something I will want. I've already dropped a 150-200 myself and feel quite a difference. May I ask what suspension componets you are using? Ive only got coil overs right now

[Carrera3.2LG50]

Originally Posted by Revvin 911S

I have a M&K one in one out with a M&K pre muffler on my 3.2 and love it. I haven't done any dyno runs so I don't have exact numbers for you, but it saved some weight and sounds great. I think the sound at WOT is just awesome.

I will second this.
I love the sound of my M&K exhaust and many of my Porsche friends comment on how good it sounds. The weight loss can only help and combined with an RB Multi-Board chip I felt enough of a seat-of-the-pants difference to be quite pleased with the results.

[benzboy]

hi ya. i cant comment on ghl or m&k, but my fabspeed euro muffler and fabspeed 1 in 2 out is awesome. the sound is unbelievable. cant tell if theres noticable power but i turn the radio off and listen to the sound!!!!

[nkotselas]

Thanks everyone!
If I do end up getting both I will try to put them back to back on a dyno and share the info

[Mitch Leland]

I just sold a M&K muffler that was 1 in, 1 out and it had a great sound, but not loud, no drone. Ben had installed a 3" tip on it and he said that it wouldn't change the sound much. Ben's workmanship is pure artestry. I don't think there is another muffler which has any better quality than M&K.

Oh, I went for a M&K 1 in, 2 out... I run the stock cat.

[Scott R]

I'm a huge M&K fan so take my comments based on that. My M&K wasn't too loud, it just droned a bit. So Ben the owner of M&K went to work on this issue and released a newer generation of M&K's to deal with this. He also worked with the community here to help design them.

So would I get another M&K, yes in heartbeat.

[fritzgator]

I don't know the GHL, i've got the M&K1/1 on my SC and love the tone, less mid drone than the stock muffler had and not much louder. I must have the next gen that Scott R mentioned and it's about perfect for my taste.

[nkotselas]

Mitch,

Your muffler was actually the one I was considering. Now that it is sold, my decision is made haha. Someday when I have the money I will go for a brand new m&k

[Caferacer]

Mitch, how much louder is the 2 out over the 1 out? Also, any seat of the pants difference?