Street Mufflers

[Orr89rocz]

I ran a 11:1 383 on the street few years back. Very loud, 90 dba idle cold start. Had a 3" collector running into single 4" ypipe into a dynatech split flow which is same thing as xr1 borla, and it was very loud. Great sound but loud

Went to a dynomax ultraflow round, 6" case in its place, and it quieted down well. Still louder than i'd like but worked.

My turbo car now runs dual 3" into magnaflow X then each bank gets 1 bullet midway down and over axle under bumper i have short fat dynomax ultra flow rounds. Muffler open to atmosphere. Car is pretty quiet for almost 800whp. You hear more turbo than anything

[rfoll]

Every muffler I have used that relied on some sort of packing or fiber to help quiet things down has become significantly louder in a very short time.

[greywolf]

Have to agree with a few here, pretty hard to beat the dynamax ultra flows. When picking up your ET slip it's just like running open headers, but a lot quieter.

[nevdos]

I use 3.5" Borla Xr-1s as well an they have a very nice tone,even at 8200rpm lol
Poeple always comment on how quiet my low-mid 9 sec car is, in the lanes, and the car still isn't very loud going down track compared to some other's i've heard
Good luck

[wil8115]

+2 on the Borla XR1. but for a street car I would probably add a "resonator" in front of the borla. drop the db's a bit more for street use.

[norm]

I went from hooker aero chambers to dynatechs. The dynatechs are substantially louder. Then put some round XR1'S on and I am very happy with them. Quieter than the hookers but have a nice deep sound. Only changes were the mufflers. Rest of the exhaust was the same 3.5" mandrel bent.

[prostreetL-78]

I have 3-1/2" Xpipe oval tube with spintech sportsmans on it and oval tailpipes. With 770 hp, it runs the same times with or without the exhaust. I will find out how well it works with another 500 hp soon.

[pdq67]

I really want to try one of these set-ups on something. Probably not the quietest but wicked cool in execution.

http://www.ramairrestoration.com/chevy/ ... -over.html

If not mistaken, my way long gone Brothers 70-1/2. 340, TA-6 Pak Challenger had a stock system like this on it but without the, "X", crossover.

If I remember right, both sides exited before the rear tires stock??

pdq67

[ptuomov]

Need recommendation on street mufflers.

73 Camaro
back halved, full tub, full cage.
540, 750hp plus 150 shot at the track.
AFR 315 Heads, vic jr port matched, pro systems hp 1000
2 1/8 headers
turbo 400, 9 inch 4.11
moser spool and axles.

Will be driving on street, any recommendations for mufflers 3inch?
Don't want to run bullets on the street.

Thanks

What’s the sound / noise objective?

[Ladderbar]

I run a 3 1/2 Borla system exit behind the doors to the side very quite and like running an open exhaust. we ran the ultra flows on the dyno and the worked very well also.

[My427stang]

I am not making the power you are, but on my 489 inch Mustang I run 3 inch Borla ProXS with an H pipe. They feel like they outpower the crappy noisy 3 inch Flowmasters I had on it before by a wide margin, but hard to tell.

On my street driven truck, likely making barely over 1/2 what you are making for power on the juice, I went with a 3 inch X-pipe and Jones Full Boar mufflers, at 500-ish HP they are very quiet and it runs great. They are also cheap compared to the leaders but very nice mufflers

My gut and experience with others say these options, no real order, they are all variants of the same design

- Jones Full Boar
- Borla ProXS or XR1 (ProXS core may not be big enough for you)
- Dynomax UltraFlow
- Hooker Maxflow
- Magnaflow

[pdq67]

I really want to try one of these set-ups on something. Probably not the quietest but wicked cool in execution.

http://www.ramairrestoration.com/chevy/ ... -over.html

I want to say that my Brothers '70.5 340 TA 6-Pak had an exhaust system like this on it stock?

I do remember that it existed in front of the rear tires!

pdq67

[rustbucket79]

Look at the post date boys, Paul’s dug up another 7 year old thread. Safe to say the O.P. has made a decision by now.

[FuelieNova]

Ya,OP hasn't been on here since 2016
Tg

[pdq67]

Every muffler I have used that relied on some sort of packing or fiber to help quiet things down has become significantly louder in a very short time.

I know they are somewhat heavier, but try steel pack, smooth perforated inner pipe real steel packs.

They won't burn out!!

If you can still buy them?

I think, "https://portermufflers.com/collections/mufflers", are still made this way?

pdq67