Will mufflers fit?
Thread Starter
Instructor
Joined: Feb 2009
Posts: 178
Likes: 2
From: York UK
Will mufflers fit?
Hi Guys,
I'd like to fit new mufflers on my '69 350 but I'm not sure if they'll fit. Hooker Aero Chambers are over 10" wide. What's the maximum width that can be fitted? Will Magnaflows fit at 14 X 9 X 4? The ones on my 'Vette are some non-standard size so I can't be sure if new ones will fit. The existing mufflers are too quiet and I'd like to have a decent deep V8 rumble, but I've read many reports now on owners who bought mufflers and then hated the deafening drone on the highway. I have Hooker headers with 2 and a half inch pipes. Any advice?
Thanks, Barry.
I'd like to fit new mufflers on my '69 350 but I'm not sure if they'll fit. Hooker Aero Chambers are over 10" wide. What's the maximum width that can be fitted? Will Magnaflows fit at 14 X 9 X 4? The ones on my 'Vette are some non-standard size so I can't be sure if new ones will fit. The existing mufflers are too quiet and I'd like to have a decent deep V8 rumble, but I've read many reports now on owners who bought mufflers and then hated the deafening drone on the highway. I have Hooker headers with 2 and a half inch pipes. Any advice?
Thanks, Barry.
Instructor
Joined: May 2016
Posts: 178
Likes: 22
From: Vermont
I just installed the 14" Magnaflows on my 71-454. Yes, they fit. But, they're pretty loud. I don't notice any drone on the highway, just around town. But I also drive with the rear window out, so that would make a difference. I don't believe that a relatively short muffler can provide a quiet sound. There's always going to be a compromise.
Instructor
Joined: Jan 2014
Posts: 128
Likes: 3
Hi Guys,
I'd like to fit new mufflers on my '69 350 but I'm not sure if they'll fit. Hooker Aero Chambers are over 10" wide. What's the maximum width that can be fitted? Will Magnaflows fit at 14 X 9 X 4? The ones on my 'Vette are some non-standard size so I can't be sure if new ones will fit. The existing mufflers are too quiet and I'd like to have a decent deep V8 rumble, but I've read many reports now on owners who bought mufflers and then hated the deafening drone on the highway. I have Hooker headers with 2 and a half inch pipes. Any advice?
Thanks, Barry.
I'd like to fit new mufflers on my '69 350 but I'm not sure if they'll fit. Hooker Aero Chambers are over 10" wide. What's the maximum width that can be fitted? Will Magnaflows fit at 14 X 9 X 4? The ones on my 'Vette are some non-standard size so I can't be sure if new ones will fit. The existing mufflers are too quiet and I'd like to have a decent deep V8 rumble, but I've read many reports now on owners who bought mufflers and then hated the deafening drone on the highway. I have Hooker headers with 2 and a half inch pipes. Any advice?
Thanks, Barry.
OEM muffler body is about 17.5" x 9.5" x 5.5". At 9.5" wide it's fairly close to the 255/60-15 tire on my 69. Right now I have OEM mufflers on my car, but already bought both Magnaflow 14" x 8" x 5" (part#12226 brushed finish) and 18" x 8" x 5" (part #14256 polished finish) for future use. Both sizes will fit comfortably. 18" will be a bit quieter than 14".
Last edited by cwwhk; Aug 2, 2016 at 07:47 AM.
Thread Starter
Instructor
Joined: Feb 2009
Posts: 178
Likes: 2
From: York UK
Thanks cwwhk,
Since I'd already bought a pair of Magnaflows which are 9" wide, I could get them fitted now I know the width is okay. The part number is 11226, so they should be much the same sound as the 12226. I probably would have gone for the 12226 if I hadn't already got these. Regards, Barry.
Since I'd already bought a pair of Magnaflows which are 9" wide, I could get them fitted now I know the width is okay. The part number is 11226, so they should be much the same sound as the 12226. I probably would have gone for the 12226 if I hadn't already got these. Regards, Barry.
Former Vendor
Joined: Jan 2015
Posts: 412
Likes: 64
Let us now how you like the sound once the new mufflers are installed. Both of our '69 catback systems use the 4x9x14" size mufflers, so there should be no fitment issues in the hands of a capable exhaust shop!
Last edited by Magna_Flow; Aug 10, 2016 at 01:58 PM.
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer
Brett Foote
10 Things Every Corvette Owner Needs (2026 Edition)
Michael S. Palmer
8 Most "Only Corvette Owners Understand" Quirks and Problems
Pouria Savadkouei
10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years
Joe Kucinski
How Much Horsepower Every Corvette Engine "LOST" in 1972
Joe Kucinski
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!
Michael S. Palmer
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!
Joe Kucinski
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter
Joe Kucinski
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Former Vendor
Joined: Jan 2015
Posts: 412
Likes: 64
#11226 - 4x9x14 (satin)
#14326 - 4x9x14 (polished)
#12226 - 5x8x14 (satin)
#14226 - 5x8x14 (polished)
If you have any questions about the sizing, please let us know!
Instructor
Joined: Apr 2001
Posts: 242
Likes: 3
From: New York, NY USA
"'69 catback systems" - does anyone need a catback system for a '69?
Le Mans Master
Joined: Jul 2000
Posts: 6,664
Likes: 162
From: columbia city in
Our 5x8 or 4x9 unit are most commonly used for upgrades since they give a nice bump in volume, but not too much to where the car is obnoxious. The part numbers below are what we would recommend. These use a 2.5" inlet/outlet diameter, but we also offer them in other sizes as well.
#11226 - 4x9x14 (satin)
#14326 - 4x9x14 (polished)
#12226 - 5x8x14 (satin)
#14226 - 5x8x14 (polished)
If you have any questions about the sizing, please let us know!
#11226 - 4x9x14 (satin)
#14326 - 4x9x14 (polished)
#12226 - 5x8x14 (satin)
#14226 - 5x8x14 (polished)
If you have any questions about the sizing, please let us know!
Last edited by terry82; Aug 10, 2016 at 08:04 PM.
Thread Starter
Instructor
Joined: Feb 2009
Posts: 178
Likes: 2
From: York UK
fitting magnaflows
That's good I know the 14x9x4 will fit. I've got Hooker headers, 2.5" pipes, but in the past the pipes had been reduced to 2" to get through the midway tunnels and then back to 2.5" Also the mufflers were offset/offset instead of centre/offset so apart from an unsightly gap on each side at the rear, a piece of the muffler had to be cut away and rewelded to clear the spare tyre carrier! Another problem was the pipes were so low they hit every speed bump on the road.
I'm putting the car in on Tuesday to get all this fixed, and since I already have the mufflers (#11226) I'll get these fitted and hope I like the sound. I heard a guy at a show who had chambered mufflers which sounded great, but apart from having difficulty getting them and already having the Magnas, I couldn't be sure if the noise would be too much at cruising speed. I'll let the forum know what I think of them next week and thanks for the info.
I'm putting the car in on Tuesday to get all this fixed, and since I already have the mufflers (#11226) I'll get these fitted and hope I like the sound. I heard a guy at a show who had chambered mufflers which sounded great, but apart from having difficulty getting them and already having the Magnas, I couldn't be sure if the noise would be too much at cruising speed. I'll let the forum know what I think of them next week and thanks for the info.
Thread Starter
Instructor
Joined: Feb 2009
Posts: 178
Likes: 2
From: York UK
new exhaust fitted
Hi Forum, I said I'd write back when the new system was fitted. I took it to Tony Banks, Leeds, England, which may be of interest to UK members. They corrected the mistakes the previous company had made - pipes too low, reduced from 2.5" to 2" where they pass through the tunnels, and they fitted the Magnaflows which I had been told wouldn't fit. The reason the first company reduced the pipes to 2" was they didn't know the gearbox mounting was worn and it caused the gearbox to drop. A new mounting was fitted and the 2.5 pipes were fine.
The mufflers, part number 11226, were fitted with no trouble. The sound is great - a deep throaty sound, but not so much that it would cause an unpleasant drone. Good rumble at low speeds, and an exciting roar at high speeds. I'm happy with the system now and I'm pleased I had Hooker headers fitted a few months ago.
Regards, Barry.
The mufflers, part number 11226, were fitted with no trouble. The sound is great - a deep throaty sound, but not so much that it would cause an unpleasant drone. Good rumble at low speeds, and an exciting roar at high speeds. I'm happy with the system now and I'm pleased I had Hooker headers fitted a few months ago.
Regards, Barry.