Exhaust: 1977 Avanti II mufflers

[studeski]

Working on a customer's car. We're putting 2 1/4" exhaust on it. He wants Flowmaster mufflers on it. He said Flowmaster Plush. I do not see them listed on the Flowmaster site. Anybody got a recommendation or part number? I do not have the original mufflers so I can not measure them for length or offset in and out. Since every body and their brother have Flowmasters, I prefer my good old glass packs, but this is what he wants. The exhaust came from Don Simmons. I just have to fill in the blanks.

Claude

[Gunslinger]

Flowmaster doesn't appear to list a "plush"...they're listed by series number. Their mufflers are also listed by dimensions. I have Magnaflows on my '70...I like their sound better than Flowmasters I've had on a different car. They have a more mellow sound that opens up with acceleration. In my experience Flowmasters are more raspy and loud...but we all have different preferences.

[studeski]

This guy is hard to understand on the phone. Maybe he meant Thrush!

[junior]

All I can think of are the flowmaster Hush Power series...perhaps?

http://www.truckchamp.com/mufflers/brand/flowmaster/series/hushpower-ii

[Buzzard]

I also find the Flowmaster on the harsh side. I always prefer the Walker Dyna Flow series and they make them in several sizes & outlet configurations. Check out their website for more info.
Bill

[StudeRich]

Thrush has always been a "Cheap" Muffler, I do not know if they have anything Quality.

[SN-60]

Originals were approx 26" in length, 2" in and 2" out, (I.D.) and no offset.

[conrad01]

put on either dynomax super turbo or cherry bomb turbo.. Throaty under acceleration yet you have a nice sound at idle Without waking the dead. My 53 gm has 2 1/2 pipes with dynomax ultraflow with a x-pipe.. Quiet when cruising but definitely opens up when you punch it.. It also has 400hp

[unclemiltie]

My 67 has Flo-42553 mufflers on it, they are 2 1/2" but they may help you find the part number for your 2 1/4" or you could shim them. They have been on the car for many years and are holding up very well.

[studeski]

Originals were approx 26" in length, 2" in and 2" out, (I.D.) and no offset.

Thank you for answering that question! Yesterday I determined 25" over all. So that's close. But I was thinking center inlet and offset outlet. I'll take another look. Your info was very important.

[Hawklover]

Don has OEM style with three different levels of "loud"
I have the loudest on my '64, and love them........at a recent cruise to a large show, several guys behind me later said they loved the 'snarky' sound of my Avanti:-).........coming from guys that bleed FoMoCo blue, I took that as an Uber compliment:-)

At idle the car "burps" and really sounds like a ride with a big block and crazy cam:-)

[studeski]

I'm still working on this piece of crap. Is there supposed to be a heat barrier attached to the underside of the floor? And what should I use? This car was originally single exhaust. This is the only time I have been involved with custom exhaust.
I ended up using the 15" (body measurement). The left side went OK. Heat and bend on the right side and the header pipe was hitting the starter.

[jclary]

Thrush has always been a "Cheap" Muffler, I do not know if they have anything Quality.

I've never heard of "Plush" as a name for a muffler. I do recall "Thrush." Those bring up a mental image of a small diameter straight muffler that we also called "bullet" mufflers. They were cheap, loud, rusted away quickly, and could get you a quick ticket (back in the day), from a small town Barney Fife type law officer.

Claude, I admire you for offering your services to others. But, when I had my plumbing business, I learned that there were some jobs better suited for "others." I developed a network of "referrals" for those jobs. Hope it all works out for you and the customer.

[sweetolbob]

This is my post on a 2 1/2" exhaust that I put on my 74 with T56.

http://forum.studebakerdriversclub.com/showthread.php?74295-74-Avanti-SBC-T-56-2-1-2-quot-Exhaust-System-and-Undercarriage

There are no heatshields originally but I installed a pair of them made of 24 ga Aluminum on the 74.

[IMG][/IMG]

I can get it on the hoist if you need a few shots. I also have the Original 2" pipes if you need measurements.

Bob

[studeski]

I've never heard of "Plush" as a name for a muffler. I do recall "Thrush." Those bring up a mental image of a small diameter straight muffler that we also called "bullet" mufflers. They were cheap, loud, rusted away quickly, and could get you a quick ticket (back in the day), from a small town Barney Fife type law officer.

Claude, I admire you for offering your services to others. But, when I had my plumbing business, I learned that there were some jobs better suited for "others." I developed a network of "referrals" for those jobs. Hope it all works out for you and the customer.

John,
Fortunately I do not do this for a living. I did a lot of other stuff to this car and the exhaust is last. I am more comfortable working on Stude powered Avantis. I only have two customers with Avanti IIs.

Thanks for your input and you are right. I'll be ready next time.