Hey, I don't exactly have a stock muffler system, but the canister itself is stock.

I have a stock gsr header, gutted cat, no resonators, 2.5" cat back mandrel piping to a new model type R muffler.

Problem ? Nothing seems to be touching metal, but from 3k to 6k rpm, I have a loud vibration/rattle sound eminating from around the muffler area. A muffler shop guy told me that because I have no cat/resonator, the un restricted exhaust flow is causing the stock chambered muffler to resonate.

I am kinda skeptical on this as I had the shop install the muffler and they say it's perfect, with no metal to metal contact.

So is this true ? Do I need to shell out another $100 for a 2.5" resonator ???

 

bump...anyone experience this ? Someone must have....

 

I have a rattle too, also coming from the muffler area. I'm running a 4-2-1 header, carsound cat, 2 1/4'' mandrel bent piping w/ resonator, and a stock LS muffler. I think the muffler guy is correct about the chambered muffler to resonate. THe rattling is quite annoying tho, especially when you're tryin to get WOT, and all you hear is a buzz. If anyone has another advice, please share it

 

i have a jdm 4-1 header->carsound cat ->custom 2.5" exhaust->stock gsr mufler with no rattling ::shrugs::

 

Hmmm... you are both running a cat...

I've never heard the rattle on a chambered muff before this. Anyone else have input ?

 

My friend has the same prob as you guys. Just buy aftermarket catback

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by hondaevo &raquo;</TD></TR><TR><TD CLASS="quote">My friend has the same prob as you guys. Just buy aftermarket catback </TD></TR></TABLE>

yeah you are not gaining anything by running your setup actually I would think that you are causing more harm then good

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by gh0st32 &raquo;</TD></TR><TR><TD CLASS="quote">

yeah you are not gaining anything by running your setup actually I would think that you are causing more harm then good</TD></TR></TABLE>

Jeez... if I had a nickel for every time someone told me that ! lol

I am running this exhaust setup purely for aural reasons... the 2.5" straight thru exhaust I was running was too loud for me daily, so I made due with the loss of top end and went with a chambered muffler (can't afford another twin loop right now). The low end gained some tho... so it was a trade off.

Problem is... now the rattle/resonation is about as loud as a N1 muffler for a few thousand rpm, so I'm kinda losing the reason I did this...