LS1SS4ever

I have 351 BBK headers with ls1 flange for ls1 fox swab and flowmaster 40 series muffler, I want muffler high flow that decreases the exhaust sound without loss any power. Could anyone give me any give options with part number & thx

billyflantos

iTrader: (6)

i was going to say the two chamber flowmaster but looks like you already have them...

ryanvv355

iTrader: (17)

Hooker Aerochambers are good

supershift67

iTrader: (1)

I used hooker super comp mufflers with the extra long case on my chevelle and they worked good. Really quiet compared to the flowmaster. Especially inside the car.

Project GatTagO

iTrader: (7)

The bigger the case the quieter. I like Dynomax UltraFlows.

Andrew

Rodder

iTrader: (2)

I ditched my flowmaster 40 series in favor of Borla ProXSes

ZMONSTER!

iTrader: (9)

Another vote for the full size dynomax mufflers. Im running them on my duals and they are just a tad louder than a magnaflow catback

back in black

iTrader: (6)

if you have room, run magnaflow 3in diesel mufflers with a 8in body 24in long. they are straight through and knock TONS of sound off. quietest high flow you can get. ive done it.

djsanchez2

iTrader: (14)

Dynomax Hemi super turbo mufflers Seriously, someone did a shootout and they flowed near the top yet remained near the bottom for sound output.
P/N: 17749
http://www.jegs.com/i/Dynomax/289/17747/10002/-1?CT=999

Here is a thread from the site of origin, there is ALOT of useful info if you look through it.
http://stevesnovasite.com/forums/sho...d.php?t=111766

Here is the link to the shootout:
http://www.pontiacstreetperformance....p/exhaust.html

Also Straightline performance large case mufflers.
http://www.racemufflers.com/ (click on large case muffler)
http://www.youtube.com/watch?v=geoWO4kCr9M

Andy1

Go to the 50 series Flowmasters. They reduce interior noise significantly. Go to their site and look at the interior/exterior noise chart to get an idea. If you don't have one already, then adding a crossover will reduce noise as well.

Andy1

LS1SS4ever

thx thats what I want, power, low sound

TTLS1GP

iTrader: (10)

x2!

Rodder

iTrader: (2)

He wants high flow, the Flowmaster 50 series kinda suck in that department.

NoClassic

iTrader: (42)

Just find the longest straight through perforated core muffler you can fit under the car. Anything baffled (flowmaster) is going to kill flow.

I am using one of these on my 3" catless Y to 4" rear section and its much quieter than expected.

Ill try and have a video by next weekend.


http://cgi.ebay.com/ebaymotors/AFE-4...Q5fAccessories

LS1SS4ever

I found dynomax super turbo but there are two choices for me which one should I getting? The case long is 20 inch or 14inch? 2.5'' inl/out
Will I get diff. power and sound from the case size?

Black Sunshine/ 00SS

iTrader: (1)

yes, the longer case will absorb more, and thus be quieter.

Eric Fischer

iTrader: (8)

Agreed. I have them on my Mustang it is stealthy quiet while running a 10.32 @ 128. I am using 2.5" mufflers (2).

TOOSLO5

Hated the blowmasters on my car when it was NA. Since I went the FI route they became "tollerable" but I still did not like them. I recently swapped them for a set of the larger case Dynomax Ultraflo's and love them. I can't however tell you how loud they will be NA since the turbo's do a great job acting as mufflers.

LS1SS4ever

Is DYNOMAX SUPER TURBO good choice? I done want lose back presser the car will be only bolt ons ....
http://store.summitracing.com/partde...part=WLK-17734

LS1SS4ever

any one ?????