Performance Muffler
Thread Starter
Intermediate
Joined: Jul 2014
Posts: 41
Likes: 1
From: East Longmeadow MA
Performance Muffler
I recently purchased a 1966 corvette with stock exhaust and was wondering if anyone could recommend a more throaty sounding performance muffler that would work with all the other exhaust components ? I have a 327 engine.
Instructor
Joined: Oct 2013
Posts: 114
Likes: 4
From: Scottsdale Arizona
Recommend a more throaty sounding performance muffler.
Thanks,
Michael
Thread Starter
Intermediate
Joined: Jul 2014
Posts: 41
Likes: 1
From: East Longmeadow MA
I recommend doing a search on YouTube. Based on reading other CF posts and seeing several YouTube videos, I purchased the N-11 Off-Road exhaust from Corvette Central for my '65 327. Unfortunately, I have not heard the exhaust yet as the car is still being assembled. Once the car is done I will post an update....hopefully before Thanksgiving.
Thanks,
Michael
Thanks,
Michael
Thanks for the input.That may be just the solution for my too quiet car.
I plan on pulling the engine and tranny for some much needed mechanical and cosmetic upgrades/repairs before I tackle the exhaust enhancement so I have some time to do some research. Please let me know how you like the off -road exhaust.
Thread Starter
Intermediate
Joined: Jul 2014
Posts: 41
Likes: 1
From: East Longmeadow MA
1966, 327-350hp. As far as the exhaust size, I believe it's stock for that engine. I just got the car last week and had my first opportunity yesterday to survey the underside for things that need to be done and things I would like upgraded.My last car was Factory 5 cobra I built, 351W w/440 hp and side pipes. I miss that rumble but right now I would be satisfied for anything above a purr.lol
Melting Slicks
Joined: Jun 2012
Posts: 3,115
Likes: 196
From: Wilton Ca.
Same year and motor as my car, you should have 2 1/2" pipes. I'm running Magnaflows, which l think have a nice sound but "rumble" is a very relevant term. That's why I said that opinions will vary. 
Instructor
Joined: Mar 2011
Posts: 248
Likes: 10
From: Schererville IN
I have CC N11 mufflers on my 327/365. I liked the sound when I first put them on, and like it a whole lot more a year later. They have gotten a bit deeper in sound after running a few couple thousand miles thru them.
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Melting Slicks
Joined: May 2004
Posts: 2,497
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From: Willowbrook IL
St. Jude Donor '13-'14-'15-'16
were you able to do the install or did ir require some custom fabrication of the pipes, into and out of the mufflers?
Thread Starter
Intermediate
Joined: Jul 2014
Posts: 41
Likes: 1
From: East Longmeadow MA
Thanks to all for the input. So many options from side pipes, to chambered exhaust, CC N-11 mufflers, Magnaflow and others. The utube videos were a great resource for listening to all the different setups with similar engine configurations as mine but also added to the quandary of which setup to choose.I guess at this point I'll make a decision after engine, suspension and transmission enhancements are done.All the above options are a step up from the conventional too quiet exhaust...or perhaps my hearing is just bad.lol
Race Director
Joined: Nov 2002
Posts: 12,142
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From: Taylor Michigan
the low horsepower small blocks {hydraulic cam} were 2 in. exhaust pipes to the muffler and 1 7/8 out the back.......
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From: Colorado Springs Colorado
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Melting Slicks
Joined: Jun 2012
Posts: 3,115
Likes: 196
From: Wilton Ca.
I purchased the exhaust system as a whole from Corvette Central. Fit was perfect and they give you the option of ordering the muffler of your choice whether it be off road, Magnaflow, Flowmasters, etc. I chose Magnaflow for sound AND performance. Some don't like a sectional system, because they claim they have problems with leaks. I have had no such problems and I like the fact that I'm able to remove it in sections if I need to do repairs without having to remove the entire system.
Last edited by Gary's '66; Oct 8, 2014 at 09:19 PM.
Le Mans Master
Joined: Feb 2001
Posts: 7,218
Likes: 399
From: Northern CA
Center Dump ceramic coated headers. 3 inch exhaust all the way back to Flowmaster 40s. Your car will suddenly breathe like GM should have let it back in '66... and they'll know you're coming.
While you're at it... give that 327 a break and dump that stock intake too. Edelbrock Performer will make a huge difference. You can save the parts and always go back to boring old stock.
While you're at it... give that 327 a break and dump that stock intake too. Edelbrock Performer will make a huge difference. You can save the parts and always go back to boring old stock.