Stock replacement mufflers

john r. lebetski

New member
Dec 20, 2006
4,659
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My PO put on some shorter body 2.25 offset/offset mufflers. This required an extension inlet pipe on each side. I'm fighting an exhaust leak at the
left donut as the pipe is sitting a bit funky. Someone posted about flowmaster 50s but I think they would be too loud on long trips and expensive.
Does anyone have road miles on the Cinnabar mufflers to share? Fit and sound and power comments? My manifolds are good, my exhaust pipes and Y are
good, long pipes and tailpipe are NOS GM so not interested in headers or rear muffler discussion at this time.
--
John Lebetski
Woodstock, IL
77 Eleganza II
Source America First
 
somewhere I a post of part number for a walker OEM replacement bought from summit for like $35 a muffler. have I think 2 summers on them, maybe 5000
miles with no complaints.

if you are fighting that leak, I would think if you replace that extension inlet with a woven flex pipe, that would put less stress on the exhaust
doughnuts??

--
Jon Roche
75 palm beach
St. Cloud, MN
http://lqqkatjon.blogspot.com/
 
If you're looking for a 2.5” in and out the All Stainless muffler part number Magnaflow 12557 is available and Jim K probably has the best price on this muffler.

For a direct replacement the NAPA # SMU18425 is the same as a Walker muffler 18425, both lower priced.

https://www.napaonline.com/napa/en/p/SMU18425/SMU18425

https://www.summitracing.com/parts/wlk-18425

I use the Magnaflow mufflers and all stainless piping except for the 3” run the back, I also have #’ SS tail pipe on the end.

JR Wright
Michigan

>
> somewhere I a post of part number for a walker OEM replacement bought from summit for like $35 a muffler. have I think 2 summers on them, maybe 5000
> miles with no complaints.
>
>
> if you are fighting that leak, I would think if you replace that extension inlet with a woven flex pipe, that would put less stress on the exhaust
> doughnuts??
>
>
> --
> Jon Roche
> 75 palm beach
> St. Cloud, MN
> http://lqqkatjon.blogspot.com/
>
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