Muffler Choice For Street Car

I'm not trying to start a fight here but what mufflers are you guys and gals using on your healthy street cars here in 2019? There are so many options its hard to pick especially without hearing them first hand.

Borla 4" XR1 21" long

wickettoby1 wrote:I'm not trying to start a fight here but what mufflers are you guys and gals using on your healthy street cars here in 2019? There are so many options its hard to pick especially without hearing them first hand.

What diameter pipe and how much room do you have for case volume...?

Plan is 3' diameter pipe and it's a '64 Galaxie so rectangular or oval would give more ground clearance.

I have Hooker Aero Chambers on my 69 Mustang with a 466. 3" with x pipe, all the way to the back. I had Hooker Maxflo's on it but they were too loud for my wife! The Aero's are a little quieter, but not much.

I just put Magnaflows 13219 on my 87 Mustang with a 521. 3" with x pipe, exiting out the sides after the rear tire. They are much quieter than either of the Hooker's and have a very good sound but they aren't a straight through like the Hookers, so they may not flow quite as well?

The Magnaflows are a significantly smaller case so they also packaged a little easier.

3 1/2" 3 chamber flowmasters on mine.
Not exactly stealth.

wickettoby1 wrote:Plan is 3' diameter pipe and it's a '64 Galaxie so rectangular or oval would give more ground clearance.

I have tested many 3" mufflers for sound level and power on the dyno so this is merely at wide open throttle.

The "Extreme Mufflers" from Extreme Technologies were far and away the best. for BOTH sound control and power. Some we tested were as powerful and others had as good sound control but, not Both ... except these.
The 14" semi-oval case #1014-3030 are great. At a later date we compared their 18" case #1018-3030 and they are even quieter yet the power level was the same.

Not a very well known company and I have no idea why except that they don't advertise nationally, much.

Thank you Randy!
I certainly will look at what Extreme Technologies has available.
I like hearing the engine, but also being able to hear a passenger talking (not yelling).

I also have never heard of extreme technologies. Randy, do you have any sound clips or can you compare it to another brand just for a reference?

Another option is a cheap/quiet muffler with electric cut-outs in front of them. Open header power at the flick of a switch.

Carl

I've thought about that too

Check out the Cherry Bomb Vortex.

https://cherrybomb.com/project/vortex/

Looking at all the mufflers mentioned I am curious as to at what point do you need a 3" or 3 1/2" or 4"?

https://www.jegs.com/i/Dynomax/289/17267/10002/-1?CAWELAID=1710592300&CAGPSPN=pla&CAAGID=61640385282&CATCI=aud-324171083249:pla-570187338865&CATARGETID=230006180041398612&CADevice=m&jegspromo=thirdparty&gclid=EAIaIQobChMI_pGXvtmb4AIVBWSGCh23cw95EAQYAiABEgKnHPD_BwE

I have these USA MADE 6" round Dynomax Stainless mufflers on my pump gas 532 truck engine. They are straight thru and I have 3" with an x pipe and turn downs on my lowered 67 F250 with a 5 spd. They have a real good sound at idle and actually with the XPipe they quiet down at little at cruise speeds.

Travis

From my experience testing this sort of stuff any muffler that you can't see through doesn't perform very well and it can often be louder than a straight through absorption type of muffler. Also it seems that the closer to the end of the pipe/farther away from the engine the more effective the muffler is when it comes to reducing noise without hurting power.

Any of those mufflers like the Magnaflow, Dynomax etc that are straight through seem to work about the same. I have a set of 3 inch Magnaflows that I've used for many years on my dyno and they work well. I also have a set of those Schoenfeld straight through ones from Speedway Motors that I sometimes use on 3.5 inch exhaust. They work surprisingly well and they are less than $20.

3.5 exhaust X pipe hush thrush mufflers with turn downs. Quiet until you hit it lol