Have a Mac O/R H? Come in for a sec.

[sgarlic]

I never noticed until last night after I was just cruising around breaking in my 3.73's, but every time I tromp on it, I hear what sounds like a metallic type noise not a pinging or knocking or anything engine related, but coming from the my mac o/r pipe.. it sounds perhaps like it's nearly right below the dash, where the exhaust manifolds bolt up to it.. when I first did the swap I heard the same noise, but it didn't appear to be a leak. I'm curious, do you guys who have this pipe all hear this noise under acceleration, or do you hear just straight exhaust and no other sound?

 

[TRS80]

I never noticed until last night after I was just cruising around breaking in my 3.73's, but every time I tromp on it, I hear what sounds like a metallic type noise not a pinging or knocking or anything engine related, but coming from the my mac o/r pipe.. it sounds perhaps like it's nearly right below the dash, where the exhaust manifolds bolt up to it.. when I first did the swap I heard the same noise, but it didn't appear to be a leak. I'm curious, do you guys who have this pipe all hear this noise under acceleration, or do you hear just straight exhaust and no other sound?

I just put a MAC o/r H on my car yesturday... no metallic noise here. I did have a leak where the down pipes bolt to the middle H piece. Hhmmm, well I will listen to see if I here anything.

 

[Justin03GT]

yea i have that weird sort of noise too....also had it with my UPR o/r x...that went away when i added cats to the x....i dunno what causes it or why...

 

['13_ImpactBlue_GT]

Havent heard it on mine, maybe a loose heat shield?

 

[sgarlic]

No, the metallic noise is part of the exhaust.. not a rattling underneath.

 

[TrueBlue03]

put mine on 2 weeks ago and i got a small leak in it but no weird noises. it could just be a tiny amount of raspy sound. What kind of mufflers do you have sgarlic??

With my magnapacks, my mac o/r H makes the loudest crackling/popping/gunshot noise i have ever heard at 2700-3500 rpms. It sounds kinda like rasp, but its not murky popping, its more like loud percise maching gun blasts. lol. scares the sh it outta people

 

[03ghoststang]

:Word: a friend of mine has that on his GT to he got an O/R H mid pipe with magna packs and it sounds like a little rasp but more like a machine gun type sound i think it sounds cool, it also scares the s**t out of me when he gets on it and is next to me

 

[95CobraStang]

I'm trying to think of what you are talking about... I had the mac o/r h on my 95 Cobra and at low RPMs under acceleration, there was a real metalic flow sound too it...i thought it was pretty cool.. Is that what u are talking about?? if so then dont worry abt it

 

[sgarlic]

It's hard to describe I guess.. sounds like if you say the sound the letter S makes like 4 times a second .. that's really the best way to describe it.

I'm pretty sure it's normal but I haven't been under the car to tighten the nuts in a long time, so it made me wonder if perhaps I have a leak.

 

[blackfang]

I dont have any noise with mine at all. Sorry.

 

[stangGT97]

It's hard to describe I guess.. sounds like if you say the sound the letter S makes like 4 times a second .. that's really the best way to describe it.

I'm pretty sure it's normal but I haven't been under the car to tighten the nuts in a long time, so it made me wonder if perhaps I have a leak.

sounds like a leak off the manifold, i had the same thing when i used to have a Mac H pipe. Either the nut came loose or maybe your gasket is toast (that happened to mine)