Muffler deletes and xyz pipes

[ssmrico]

Anyone know or have any idea if these Q60 exhaust tips would fit the M37?

[wideopn11]

I'm pretty confident no. Look at the hangers to start with. You'd need a shop to move those. Fitment might be close but at that point if you are having a shop do any custom work you should probably just have them custom the whole thing.

[armybrat]

ssmrico those will fit the 3.7 coupe, not the sedan. The coupe uses a single muffler mounted sideways with dual outlets on each end, which is why the hangers on the deletes you posted are in line with the car, instead of sideways like the picture above.

[ssmrico]

ah damn ok thx they are local for cheap so thought I would ask

[armybrat]

Yeah plus the flanges on the coupe muffler are straight off the midpipe while the flanges on the sedan are angled, plus the spacing between the pipes are different. You might be able to have a shop modify the flanges and hangers if it's close enough.

[ssmrico]

if it would be just the flanges that would be cake I have a few local fabricators

[PostalsQ]

So I'm curious. You've talked about test pipes. Now muffler delete. So you don't want any restrictions. But you do realize that a balance of back pressure is needed. Your exhaust requires a certain amount of scavenging to be effective. In theory. No back pressure on a race car will perform best. But your street car needs scavenging in order to run optimum at all times.

[armybrat]

So I'm curious. You've talked about test pipes. Now muffler delete. So you don't want any restrictions. But you do realize that a balance of back pressure is needed. Your exhaust requires a certain amount of scavenging to be effective. In theory. No back pressure on a race car will perform best. But your street car needs scavenging in order to run optimum at all times.

Well said. Actually even race cars need scavenging as well, which is why their exhaust systems benefit from a more straight through design like larger diameter piping, headers, cat/resonator and muffler deletes which maximizes the scavenging effects at high RPM's. This same set up is worthless in a street car driven by 99% of us in the lower RPM range as a daily commuter car. The M/Q series is sold as a luxury car, and the engines/exhaust systems are tuned for that type of driving. Of course there is room for improvements/mods to the exhaust system, but care must be taken to ensure that the scavenging effects are not compromised. Most if not all of your aftermarket catback systems like Stillen, Ark, Motordyne, etc. are sized and engineered to maintain OEM scavenging with a bump in performance. When you start deleting mufflers, resonators and cats, you will alter the scavenging effects in a negative way unless you have the car custom tuned to match your exhaust.

There are a lot of articles on exhaust scavenging, mods, etc. Folks should do some research based on their driving habits before messing with their exhaust set up. Just my 2 cents.

[ssmrico]

yeah I have asked about all of it and have not done anything yet at im new to this platform and na, my other cars have been turbo, or evos, or turbo civic etc. other na car I had was my z06 and it was already cammed with kooks headers and corsa catback so it was good to go

[PostalsQ]

I realize your new to the forum. And hopefully some of us lead you in the right direction. Thats why I mentioned the garage line Y/X pipe design. I'm not against test pipes. But you'll get annoying exhaust resonance. I saw a red G37 on YouTube. He had headers. Mufflers. CBE can't remember the make. 2 resonators. It sounded horrible imo. He added 2 more resonators and it tamed the resonance big time.

[ssmrico]

Oh well that's good to know. and they make them for the m37 rwd? I have not found them from garage line

[PostalsQ]

The 370z model will work. The motordyne xyz pipe I had was listed for the 370z too. The garageline will work on rwd models only. You'll have dual outlets if you go garageline. So all you'll need to do is custom make a new inlet/outlet for the garageline leading to your midpipe.

[ssmrico]

so not bolt on after all boo lol

or ur saying motordyne is bolt on and garageline is not? new to these companies too lol

[PostalsQ]

My motordyne bolted directly up to my stillen. Stock. No mods needed. I decided to mod my y pipe and add the x to it. Custom making something similar in a Frankenstein fashion to the garageline and cutting my stillen from a single inlet to a dual. Again. Just my opinion. The X pipe adds torque which our 3.7 greatly lacks. The garageline x pipe will work. Trust me. But whatever CBE you get. You'll have to custom fit that to the garageline. Even the ARK CBE I was initially after only has a single inlet mid pipe to the Y.

[PostalsQ]

https://youtu.be/P4z2PJLD2Sc
This is what I was referring to.

[ssmrico]

so on stock exhaust the motordyne will botl on? if so u know a link to it?

[PostalsQ]

https://motordyneengineering.com/produc ... -xyz-pipe/

[ssmrico]

thx dang kinda pricey didn't think it would be at that range for as much as it does umm

[wideopn11]

@PostalsQ, so is that motordyne Y pipe you linked above what I need to fit between the top (single opening) of my Stillen exhaust and the cats or high flow cats? Is it the same diameter as the Stillen? From the pic I don't see how it bolts up. Do you have any pics of your exhaust installed?

[PostalsQ]

The motordyne will bolt directly up to the Stillen system and your stock or aftermarket HFC's or your stock cats. I initially did that. Then I chopped up my motordyne and created an X with dual outlets. Then cut my stillen and mated the 2 up. Check my past posts. You'll find some pictures there. BTW, this is all for rwd cars only. These won't fit AWD models. Extensive modding would need to be done if it were awd models.

[ssmrico]

on the hfcs any for m37 of course will fit but what year 370z or g37s fit if any? that way if I come across any on a good deal I know what works

[PostalsQ]

You'll have to research it. But I'm pretty sure all 3.7 370z's HFC's or test pipes would fit our cars. The test pipes & hfc's r going to be the same. AWD or rwd. It's the y pipe that needs to be longer on the AWD models.

[ssmrico]

what I was thinking but true I will look into it a bit more thanks

[wideopn11]

The motordyne will bolt directly up to the Stillen system and your stock or aftermarket HFC's or your stock cats. I initially did that. Then I chopped up my motordyne and created an X with dual outlets. Then cut my stillen and mated the 2 up. Check my past posts. You'll find some pictures there. BTW, this is all for rwd cars only. These won't fit AWD models. Extensive modding would need to be done if it were awd models.

Has anyone with AWD tried fitting a y pipe or specifically this motordyne xyz pipe? I'm thinking I might be a guinea pig yet again to try to get this working. I vaguely recall seeing someone use flex connectors to deal with the AWD but I can't remember exactly.

[armybrat]

Has anyone with AWD tried fitting a y pipe or specifically this motordyne xyz pipe? I'm thinking I might be a guinea pig yet again to try to get this working. I vaguely recall seeing someone use flex connectors to deal with the AWD but I can't remember exactly.

That was probably me. I purchased Majestic's X-pipe exhaust when he sold his car. His was a sport model, mine is AWD. It would not fit because of the AWD transfer case. I had to cut the pipes before the X-pipe and add flex connectors to lengthen it enough to clear the transfer case. Also, I had to remove the same amount of piping after the X-pipe to be able to bolt up to the factory mufflers.

In a nutshell, the overall lengths of the exhaust systems from the manifolds back to the mufflers are the same for RWD and AWD. However, the AWD front Y-pipe is longer to clear the transfer case and the midpipe is shorter by the same amount.

[ssmrico]

ill be doing muffler delete and then the high flow cat dps soon

[wideopn11]

My motordyne bolted directly up to my stillen. Stock. No mods needed.

PostalsQ; so I'm in talks with a shop to fit the motordyne xyz pipe around my AWD and they pointed out that the Stillen has a 2 bolt flange but the motordyne has a v band flange. How did you bolt these together initially? Am I looking at the wrong parts?

[DKASM37]

My motordyne bolted directly up to my stillen. Stock. No mods needed.

PostalsQ; so I'm in talks with a shop to fit the motordyne xyz pipe around my AWD and they pointed out that the Stillen has a 2 bolt flange but the motordyne has a v band flange. How did you bolt these together initially? Am I looking at the wrong parts?

Stillen has a 2 bolt flange and the end of the xyz pipe has the v band clamp but that is to connect to one of the 3 modules available (resonator, straight pipe or high flow cat). The ends of all 3 of the different modules have a 2 bolt flange to connect to an an aftermarket system.

[ssmrico]

getting this done sat

[wideopn11]

Stillen has a 2 bolt flange and the end of the xyz pipe has the v band clamp but that is to connect to one of the 3 modules available (resonator, straight pipe or high flow cat). The ends of all 3 of the different modules have a 2 bolt flange to connect to an an aftermarket system.

Oh I see; like this...