Exhaust Help
Senior User
Joined: May 2010
Posts: 318
Likes: 2
From: Hanford, Cali
I think you'll like the system, and if you feel you need alittle more "tone", go to Flowmaster's website and look for their Y-pipes in just about any size you like, and get a little better flow to boot. Any good muffler shop can put it in. You'd probably need the (2)2-1/2" inlet into single 3" outlet unit to work right w/ your system.
Moderator
Joined: Aug 2002
Posts: 6,105
Likes: 385
From: Southern California
As you can see, Flowmaster 2 & 3 chamber mufflers are rated amoungst the lowest in flow capability......a glasspack with no louvers outflows them as well unless you are compareing to oem replacement units.
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
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
New User
Joined: Jul 2012
Posts: 14
Likes: 1
sorry I've missed this chat for a while but its been real busy at work. I created a short video showing what I have done with the Dynomax Y pipe. I've found the mod to help a bit in the power loss area, but there is still no improvement in the mpg area. I originally thought I gaind 1 of the 2 mpg I lost, but after driving it more that turned out to be not true. I will do 1 more mob to this thing before I throw the piece of crap in the garbage and put the factory resonator back on........all this just to get a better sound, grrr
Here is the link 6 2 exhaust - YouTube
Here is the link 6 2 exhaust - YouTube
Senior User
Joined: May 2010
Posts: 318
Likes: 2
From: Hanford, Cali
A flowbench is a poor indicator of horsepower improvement because an engine does not flow gases the way a flowbench does. If you check dyno charts done independently of Flowmaster, you'll see that even though the Flowmaster flows a lot less than even a straight pipe of the same diameter, the horse power is equal to, or sometimes greater than that of the pipe in question due to the pulse-reflecting properties of the Flowmaster. I don't work for nor endorse Flowmaster, I just know how they work, and that they work exceptionally well. Independent dyno tests have proven this. Flow numbers do NOT tell the story.
Senior User
Joined: May 2010
Posts: 318
Likes: 2
From: Hanford, Cali
sorry I've missed this chat for a while but its been real busy at work. I created a short video showing what I have done with the Dynomax Y pipe. I've found the mod to help a bit in the power loss area, but there is still no improvement in the mpg area. I originally thought I gained 1 of the 2 mpg I lost, but after driving it more that turned out to be not true. I will do 1 more mod to this thing before I throw the piece of crap in the garbage and put the factory resonator back on........all this just to get a better sound, grrr
Laughing Gas
Joined: Jul 2010
Posts: 859
Likes: 10
From: North Carolina
I think you'll like the system, and if you feel you need alittle more "tone", go to Flowmaster's website and look for their Y-pipes in just about any size you like, and get a little better flow to boot. Any good muffler shop can put it in. You'd probably need the (2)2-1/2" inlet into single 3" outlet unit to work right w/ your system.
Thanks for the info. I put the Flow Master on this weekend. It went on with no trouble at all, easy install! I had a choice of side exit or rear exit, I went with rear exit. It sounds great, nice deep rumble, not to loud, and no droning. So with the new tires, new ranch hand grill guard, new steps, and new exhaust, it looks AND sounds like a truck of its’ size should...
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1979FordF-250
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