The same thing happend to me with my 56 BelAir. When I got it it had Flowmasters, but it was a bit to loud for my taste, so I replaced them with a couple turbo mufflers from Summitracing and gained gobs of performance. The engine was a SB 400 with a 350 crank yeilding 377 CID, Keith black pistons, "H" beam rods, scat forged steel crank, edlebrock aluminum performer heads, and matching intake, hooker headers, and a bunch of other goodies. Yeah, the right muffler can make a difference.

 

Is it possible that Walker either sold out or changed their name to Dynomax? Did a search for Walker and found a connction to this at Summit Racing....

http://www.amazon.com/gp/search/ref=...0&Go.y=0&Go=Go

Note the part #WLK.....

 

i am off to get mine now and will have installed in the morning.
total install w tax guaranteed will be $90.
im pleased
i loved the sound clips
cant wait.
later guys

 

Walker, Dynomax and Thrush are all the same company.

http://www.walkerexhaust.com/

 

back in 55 min w muffler a muffler
install in the a.m.

cant wait
37 mod will be done
sunday will paint back seat

 

cj, where did you get your muffler? Did you get it from Mike?

 

would removing the cat add hp?

 

Yeah but you wouldn't meet an emissions test and it's illegal to remove it on cars that came from the factory with it.

 

Unless the vehicle is meant for off road use of course. I had to add that before someone else pointed that out for me.

 

i found a local Lewisville muffler shop that quoted me a price of $90 including tax installed no matter what for a finished install.

i had one shop quote me $49 for the muffler plus instal so this is inline and they told me $35 to $50 for the install, so still about the same.