My new mufflers just showed up today. They will replace the ones I bought back in 1996 that have over 700 hrs. I have their modified K35 Beechcraft dual exhaust on my 470 K.

Those look good. To verify, they are new manufacture not OH'd?
I was wondering what they set you back?
FWIW, last fall I bought a set of new mufflers for my 53 model from Aerospace Welding for $383 apiece--
which was less than Knisley wanted to OH my old ones.

These were $522 each and brand new. These are bigger inlet/outlet than the original since the stacks look more like headers. I modified my original system from the 470 A by putting 4 bolt flanges on. After a year of running that setup, Knisley was able to make a whole new system for me.

You might know where I can get new collectors for my C180, 1955?
Please email me:
[email protected]

Richard, here are a few places that can help you. Looks like AWI might be your best bet for collectors. Make sure to tell them to double check alignment since you are so far away. Knisley has the modified for 4 bolt flange engines----you might still have 2 bolt flanges.

http://www.awi-ami.com/page%2011.pdf
http://www.dawleyaviation.com/?_vsrefdo ... aQodTqwFBw
knisleyexhaust.com/cessna-180-catalog