USCGREEL

That was my idea originally after cutting them up, but now Im thinkin I'm goin to throw some fiberglass mat material in there for the quiet side, might work....I dunno. We will see. In my head it seems like it would work.

CivEngineer

Looking for a place around Orlando to do the muffler mod as well.

USCGREEL, did you finish your project yet? sound clip?

USCGREEL

Hell if I get a welder, i'll start doing it! I haven't finished it yet, I have been trying to find a welder, but i'm thinking about just buying a cheapy

ToppThat

I bought mine online last summer from www.toolfetch.com its a hobart handler 210#500526-783.02 free ship no tax leased lg.tank 1st fill 54.00 mixed gas works great.good auto dark.hood 170.00 good luck.

USCGREEL

Well i bought a cheap welder and this is what I got...I think it is going to be awesome, no more breaking baffles!! I am waiting for my fiberglass exhaust wrap to come in and I will wrap the perforated pipe and weld it all up, then hope that the quiet side is actually quiet.


If anyone steals my idea they have to give....uh.. 50 bucks.

Oskee

Abel Chevrolet in Rio Vista (Rich) did my muffler mod in my 2008 Z06 over 2 years ago so far no problems

USCGREEL

If that is your only big mod then yeah prolly 2 yrs...

veech

how would the quite side get exhaust flow? looks like you have it completely bypassed?

tim414

He is. He's referring to the tools he used and parts he used to do mod on his stock Z06 mufflers.

USCGREEL

New exhaust!!! Everything is exactly what I wanted, really loud loud side, really quiet quiet side

USCGREEL

http://i810.photobucket.com/albums/z...l/635eee99.mp4

RichieRichZ06

Thanks!

The reason they last when we do them is that we figured out almost 5 years ago that you need to add additional tack welds to those inner panels when you open them up to do the mod. We have always added those welds to the inner panels and we've never had a rattle issue since.

ToppThat

Great work solving the quiet side.Im sure its gonna happen to me but even if it doesnt its a great winter project to reduce backpressure on quiet side mod might cause.Fifty Thanks for pics.

JPSlick

Hey

I'm curious if your fix ended up working long term?

My current exhaust had the "Exhaust Mod" done by the previous owner and it's rattling and raspy now which leads me to believe the internals have likely cracked like your original post on the first page.

I'm debating on having them cut open again and re-welded...

OR

cut open again and remove the piece that cracked completely...

OR

Get a new stock exhaust and maybe just go with cut outs before the muffler.

08VRZ06

When you first did the muffler mod did you put the fiberglass back in that was in there in a bag?? I took my fiberglass out of the bag that it was in and stuffed it back in there before welding it back close. No problems so far and that was over 10,000 miles ago.

If you didn't maybe that is why it cracked.....

Mark

tarmactrr

It's not bypassed. The main pipe has holes in it by the end of the muffler. When the butterfly valve is closed it pushes the exhaust out of those holes, which inturn then moves towards the holes in the perferated pipe. That's how it works.

Question would be is the flow enough to not hurt performance below 3500rpm if using the stock butterfly valve system.

JPSlick

Hi Mark

I do not know as this modification was done by the previous owner.

I'm on the fence between having a shop cut it open an re-welding but I'm in fear of possibly having to do it all over again if it cracks.

If I can remove the cracked piece altogether to avoid it breaking again, I'll do it. However, if there is still potential of another failure I probably won't bother and just go back to stock.

This modification maybe had 3,000 miles on it before it cracked.

streetking408ys

I just made a quick video about this junk ZR1 muffler failure and put it up on Youtube since there are zero videos on the subject that I've found. Many Z06 owners do the perforated pipe mod and never even think to look at that wall/baffle so it would be good to get the word out so people can either fix/strengthen the wall while in there doing the mod, or if you have a good unbroken set of mufflers you can reinforce it BEFORE it cracks all to sh**. What a horrible design.

Armando Estrada

How has this setup held up over time? My c6z06 mufflers just starting rattling and wanted to remove the cracked walls all together just like you did here! Any performance issues? Or backpressure issue when on quite mode or loud mode on lower rpms?! Anyone feel free to chime in! If i could completely remove these flimsy metal walls and run this setup like in these pics without issues, that would be the ideal fix without having to fix this stainless walls that crack and make your car rattle! Old thread hopefully someone can revive it!

v8sten

ZR1 ZR1 Owners. Does your muffler make a buzzing sound or rattle? - CorvetteForum - Chevrolet Corvette Forum Discussion

Here is how I fix them.