OLDScience

Dynomax used to make a 17561 muffler, that was a 20" x 9.75" x 4.5" body which was as close to a perfect muffler for stock systems. Unfortunately they discontinued this 2 1/4" offset/offset muffler. Does anyone have an alternate brand? I don't like flowmasters, so they wont be a candidate....

Thanks in advance...

copper128

What about Walker's 17843. It's pretty close to the dimensions you listed.
http://catalog.walkerexhaust.com/cat...dStatus=ACTIVE

copper128

Or maybe this would work: http://www.summitracing.com/parts/imo-cm20/overview/

Here's a .pdf of all the IMCO dimensions so you can match one up to your needs
http://www.imcoweb.com/am_cms_media/...articmwc11.pdf

70oldsW30

That 17561 part number shows up as a Dynomax Ultra flow with a 20" case but it has a center inlet, not offset. Maybe they reused the old part number for a new part, i dunno. Otherwise, that part seems to still be good but not with the offset inlet. Part number 17226 is an Ultraflow with offset both in and out but with a case length of 14".

joe_padavano

Nothing a short section of straight pipe won't fix.

joe_padavano

The Summit web pages lists both inlet and outlet as offset, despite what the photo shows.

http://www.summitracing.com/parts/wlk-17561

Gotta read the fine print (considering that the photo is of a THRUSH muffler):

"Image is a representation of this item.
Actual item may vary."

This site appears to have the correct photo:

http://autoplicity.com/products/4274...FQWk4AodhFcAQQ

OLDScience

The 17561 is the correct p/n for offset / offset 2-1/4. It's in the Dynomax catalog. I think what I'm going to wind up doing is using a 2.5" Dynomax welded stainless p/n 17560, and adapt the 2-1/2 to 2-1/4. The 17560 has a 20" body/shell and is 25" overall. If I use a 2-1/2" ID on the muffle to a 2-1/4 OD adapter It wont be too noticeable if it's made short enough.

70oldsW30

I apologize for the errors in my post.

OLDScience

Be careful, the classicolds police may be paying you a visit! You dont wanna mess with them... :-)

mrgoodtool

Dual 18" Magnaflow's Only way to go...The sound is awesome! and...the Cops will never hear you coming!