I have a 2013 F150 with a 6.2l. I am getting ready to install a rebuilt engine that has 550 hp. I have long tube headers and dual 3" high flow cats already. I am planning on 3" dual pipes all the way out the back. I am looking for mufflers that will not restrict flow but are quiet, close to stock. My initial thoughts are to put a x-pipe right after the cats, then 2x Vibrant 1142 resonators, then 2x Dynomax super turbo 17769 mufflers. Anyone have any comments or recommendations?

 

I have DynoMax SuperTurbos on my previous 400hp-emissions-legal 393W stroker. Shorty headers, 2-1/2" catted H-pipe to 2-1/2" DynoMax SuperTurbo muffs, and dual 2.25" tails (size restraints due to chassis) Nice low mellow sound, not raspy at all. I ran back-to-back passes at the track uncorked and through the full exhaust. NO difference in ET or MPH That tells me the SuperTurbo exhaust is NOT a real restriction! Just a heck of a lot louder when uncorked!





Now that car has been upgraded to a 600+hp 395W, longtubes, 3" back to 3" SuperTurbos, and those same 2-1/4 tails. I LOVE sleepers!, LOL!!!

 

Cool, that is what I have been told, good to hear it from someone with experience. I am looking for something close to a stock sound, how much louder do you think they are from a stock setup?

 

Use an offset/offset dynomax muffler. It's the only true S style core and flow better than the other styles which have smaller tubes and dead end baffles.

 

The DynoMax Super Turbos have true-size cores - meaning that unlike the competitors, don't neck down inside the muffler. Other cheaper brands will use a 2" core inside, but put whatever size inlet/outlet pipe size. The DynoMax will use a 2", 2-1/4, 2-1/2 or 3" pipes INSIDE the muffler.

And FWIW, I used Offset in/center out mufflers on my application, like the factory used -- made chassis fitment a non-issue. Offset/offset would interfere with the rear shocks.

As for louder? My stock engine was only 180hp... Now that it is 3X the power? Well, it is NOT 3X louder, but by the rumble you know that it isn't 'stock', LOL!

 

Everything you ever wanted to now..................

broaderperformance.com/muffler_flow_tests.htm (Independently tested cfm flows of the more popular mufflers, glasspacks and resonators @ 15” wc:
2 ½” diameter straight pipe 521
2 ¼” diameter straight pipe 365
2” diameter straight pipe 283
2 ¼” diameter tailpipe 268
2 ¼” round glasspack- no louvers 274
2 ¼” round glasspack- with inward punched louvers 133
2 ¼” round glasspack- inward punched louvers/installed backwards 141
2 ½” inlet/outlet Dynomax SuperTurbo 268
2 1/4” inlet/outlet Thrush CVX 260
2 ½” inlet/outlet Flowmaster 2-chamber 249
2 ¼” inlet/2 ½”outlet Cherry Bomb turbo 249
2 ¼” inlet/outlet Flowmaster 3-chamber 229
2 ¼” inlet/2 ½”outlet Maremount Super C (OEM Replacement) 149
2 ¼” inlet/2” dual outlet Maremount 183
2 ¼” inlet/outlet California Turbo 229
2 ½” inlet/outlet Hooker Aerochamber 324
2 ½” inlet/outlet Hooker MaxFlow 521
2 ¼” inlet/outlet Maremount Cherrybomb Vortex 298
2 ½” inlet center/outlet offset Borla Turbo 373

http://www.popularhotrodding.com/eng...../index1.html (this is an in-depth article that tests not only the mis-conception of flow demand but also how placement of a muffler (a glass pack in this dyno test) can actually "fool " the system into thinking that it is essentially a straight pipe.

I have listed here a muffler shootout test done by CAR CRAFT:

The Mufflers
MAKE MODEL Part No.
SUMMIT Turbo 630125
THRUSH Magnum Glasspack 24214
THRUSH Boss Turbo 17718
HOOKER Competition 21006
DYNOMAX Super Turbo 17733
DYNOMAX Race Magnum 24215
HOOKER Super Competition 21106
SUMMIT Fully Welded 630325
FLOWTECH Afterburner 50322

MUFFLER FLOW TEST

MUFFLER Flow at 28-in H20
DynoMax Race Magnum 528.64 cfm
Thrush Magnum Glasspack 507.40 cfm
Summit Fully Welded 343.38 cfm
Flowtech Afterburner 342.20 cfm
DynoMax Super Turbo 333.94 cfm
Hooker Competition 232.46 cfm
Hooker Super Competition 320.96 cfm
Summit Turbo 331.16 cfm
Thrush Boss Turbo 297.36 cfm

MUFFLER Idle dB WOT dB
DynoMax Super Turbo 89 123
DynoMax Race Magnum 94 133
Flowtech Afterburner 92 124
Hooker Competion 92 122
Hooker Super Competion 90 125
Summit Turbo 89 124
Summit Fully Welded 92 125
Thrush Boss Turbo 90 123
Thrush Magnum Glasspack 92 128

DYNO TEST
All mufflers were dyno-tested on a 355-cube SBC with 10.0:1 compression, Air Flow Research 190 aluminum heads, a CompCams 292 hyd. a Victor Jr. intake, a Holley 750-cfm double-pumper, and 1 5/8 Headman headers.

MUFFLER HP TORQUE 2,500-6,000rpmAverage
Hooker Competition 397.4 381.1 286.8hp/351.9 lb-ft
Thrush Boss Turbo 407.1 384.9 292.1 hp/357.5 lb-ft
DynoMax Race Magnum 409.5 394.3 298.8 hp/366.9 lb-ft
Flowtech Afterburner 409.7 391.2 294.8 hp/361.7 lb-ft
Thrush Glasspack 409.5 389.8 297.7 hp/365.3 lb-ft
Summit Turbo 411.5 386.3 291.5 hp/357.4 lb-ft
DynoMax Super Turbo 412.7 387.2 292.6 hp/358.6 lb-ft
Hooker Super Comp 413.8 387.2 292.8 hp/359.0 lb-ft
Summit Fully Welded 415.4 390.7 295.6 hp/362.4 lb-ft

Hope this helps.....................