MUFFLER LOUDNESS

galaxie · Sep 24, 2007

l HAVE A 66 COUPE WITH A SOLID LIFTER 300 HP MOTOR. It also is a 4 speed car.
I need to replace the exhaust system as I intend to sell the car.

Question is, what preference do you have regarding the volume sound of the dual exhaust system. Quiet, little loud or deep and loud. Please use your own description for tone and loudness. I am trying to determine what the masses would perfer. Thanks for your help.

jspagna1 · Sep 24, 2007

One word: Flowmasters.

StangDreamin' · Sep 24, 2007

Another word: Magnaflow.

Just a "little burble" at idle to give you the idea that there might be something going on under the hood.
Under mild acceleration, you start believing that something is indeed "different" in the engine bay.
When you romp on it (WOT); any and all doubts are removed.

EDIT: In Mercury Cougar terms (when I get get mine on the road, then get the exhaust "done right"with headers, x-pipe and duals); the car will:

"Purr" at idle.
"Growl" under mild acceleration.
"Screaming Roar" at WOT

Works for me!

oldfordguy · Sep 24, 2007

Ditto on the "Flows". My wife enjoys the semi-quiet ride and still you can hear me coming a block away.

ga289stocker · Sep 25, 2007

+2 for the Magnaflows, for cruising they are great, none of that drone you get w/ the flowmasters, hit the gas and they really come alive...

57fairlane · Sep 25, 2007

I really don't care for the sound of straight-thru mufflers. IMO chambered stuff sounds much better at idle where you can let the car sit and listen to the idle.

I like spintechs a lot, they let the cam hit at idle and are relatively quiet crusing and get loud at WOT. They don't have near the drone that my flowmasters did.

galaxie · Sep 25, 2007

Thanks for your views. What size pipes would you use. Thanks!

57fairlane · Sep 25, 2007

probably be easiest just to stick with 2 1/2"

blown65 · Sep 25, 2007

Magnaflow is what I have on my stang. (they are going bye bye too. lol)

They are great for ppl that dont care about hearing an aggressive cam, they are a very mellow muffler that does sound very good at WOT.

Spintech is what I'm going to and it has an awesome note at idle with large nasty cams, and also sounds great at WOT.

If you want a loud detailed engine sound then spintech, if you want mellow but good sounding at wot then magnaflow.

2 1/2" piping is fine btw.

351carlo · Sep 25, 2007

I think it depends on what you're looking for and how much noise your motor is capable of.

My high compression (12.5:1) solid cam (.570/.590 246/256 on a 108) motor sounded downright MEAN with a set of hooker long tubes and dual 2.5" Flowmaster 40 series.

But it was just too darn loud. Now I'm upping the cam again, putting a larger set of headers on it, going with 3" exhaust and getting a set of Magnaflows. I want to be able to cruise around and not get a headache.

The car did sound very good with the Flowmasters on it, and I got many compliments on the sound quality. I ran Hooker Competition headers, dual 2.5" pipes and dual 40 series Flowmasters.

Come to think of it, I guess I'm selling the flowmasters since I'm taking them off. Shoot me a PM if you want them for something cheap.

StangDreamin' · Sep 26, 2007

blown65 said:
Magnaflow is what I have on my stang. (they are going bye bye too. lol)

They are great for ppl that dont care about hearing an aggressive cam, they are a very mellow muffler that does sound very good at WOT.

Spintech is what I'm going to and it has an awesome note at idle with large nasty cams, and also sounds great at WOT.

If you want a loud detailed engine sound then spintech, if you want mellow but good sounding at wot then magnaflow.

2 1/2" piping is fine btw.

When I was (much) younger - as in High School - I loved the sound of my Dad's '70 F100 4x4. 390, wide ratio 4-speed, 4.11's front and rear, (Thorley?) headers, 2-1/2" dual exhaust (no h-pipe) dumping under the back bumper and literally empty 40" glass-packs. When one tailpipe rusted out (ran the beaches of El Golfo de California a lot) over the axle; he had them re-done to dump out the side, just ahead of the back tires and he replaced the "big hollow resonators" with new 40" glasspacks! I was not impressed. But by the time I was ready to move out of the house, I had least half the glass blown out; and it was starting to sound "good" again.

When I bought and later rebuilt my '72 F100 4x2 a few years later; my "engine guy" had a set of Ford cast-iron "shorty header" manifolds that came factory on a 68 T-bird 345 horse 390 - which fit like a glove on my new-to-me 406 .
He talked me into keeping the factory single exhaust (had to cut/bend/re-weld the left half of the y-pipe) and muffler, only going up to a 2-1/2" pipe for muffler back. Had a teeny bit more "throat" at idle and a bit more at WOT (if you were driving next to the exhaust dump); but it was usually drowned out by the sound of the motor trying to ingest/swallow the carb (at first an old AFB, later a Holley 750DP).
Took quite a few guys to school at stoplights; the class was "Stealth", lessons usually cost $20-$50 a pop, payable at the next stoplight. Also sounded quite righteous pulling a loaded trailer

Since then I've gotten a lot older; and since the '73 XR-7 looks kinda like a Lincoln Mk III of that era, I'm thinking of going back into the "stealth mode" - if nothing other than to educate some ricers with their fart-cans and airplane wings

mustang6tee8 · Sep 26, 2007

JDS68Stang · Sep 26, 2007

Got dual Purple Hornets on my custom 91 Silverado, has a deep throaty sound, had a lot of compliments on the sound of it.
Kinda still to quiet for me though, would luv to find the original designed ones from the 70s but Govt. outlawed them.

My 68 Stang is stock.

GNN60GT500 · Sep 26, 2007

I run MagnaFlow on all my classics- the sound at wide open throttle is ....well cant put into words how great it sounds-

blown65 · Sep 26, 2007

StangDreamin' said:
When I was (much) younger - as in High School - I loved the sound of my Dad's '70 F100 4x4. 390, wide ratio 4-speed, 4.11's front and rear, (Thorley?) headers, 2-1/2" dual exhaust (no h-pipe) dumping under the back bumper and literally empty 40" glass-packs. When one tailpipe rusted out (ran the beaches of El Golfo de California a lot) over the axle; he had them re-done to dump out the side, just ahead of the back tires and he replaced the "big hollow resonators" with new 40" glasspacks! I was not impressed. But by the time I was ready to move out of the house, I had least half the glass blown out; and it was starting to sound "good" again.

When I bought and later rebuilt my '72 F100 4x2 a few years later; my "engine guy" had a set of Ford cast-iron "shorty header" manifolds that came factory on a 68 T-bird 345 horse 390 - which fit like a glove on my new-to-me 406 .
He talked me into keeping the factory single exhaust (had to cut/bend/re-weld the left half of the y-pipe) and muffler, only going up to a 2-1/2" pipe for muffler back. Had a teeny bit more "throat" at idle and a bit more at WOT (if you were driving next to the exhaust dump); but it was usually drowned out by the sound of the motor trying to ingest/swallow the carb (at first an old AFB, later a Holley 750DP).
Took quite a few guys to school at stoplights; the class was "Stealth", lessons usually cost $20-$50 a pop, payable at the next stoplight. Also sounded quite righteous pulling a loaded trailer

Since then I've gotten a lot older; and since the '73 XR-7 looks kinda like a Lincoln Mk III of that era, I'm thinking of going back into the "stealth mode" - if nothing other than to educate some ricers with their fart-cans and airplane wings

Ya, I agree for the most part cept when you build a nasty sounding motor you kinda wanna hear it. (At least I do) I love the sound of the Magnaflows but for my setup I dont like it. (Ive had this setup for about 8 yrs now too)

We have a set of Borla XR-1's on our blown 54 pickup. God that thing sounds nasty when you hit the throttle. (750hp on the dyno, and 3 1/2" exhaust) But god, you cant drive it very long without your head ringing. lol

bdepedro · Sep 26, 2007

I agree with the overall concesus. Magna flows are more mellow especially at idle while the flowmasters are louder and deeper. I have flowmasters on mine and love the overall sound but they definitely have a drone that almost lulls you to sleep at about 2500 rpm running. Overall very happy with the setup but it really does depend on how you use your car.

351mustang65 · Sep 27, 2007

get 65 shelby gt350 side exhaust only $150 for 2.5 in

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