Just installed a Flo~Pro 4" tubo back exhaust system - Ford Powerstroke Diesel Forum
6.0L Performance Parts Discussion What has or has not worked for you?

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post #1 of 11 Old 08-26-2013, 06:05 AM Thread Starter
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Just installed a Flo~Pro 4" tubo back exhaust system

Yesterday I installed a Flo~Pro 4" turbo back exhaust system (P/N 824) with 4" down pipe, no cat with a muffler and I wanted to jot down some notes for future searches.

1. System was well packed in the box. Nothing was going to move around in that box.

2. Unfortunately a couple of the pipe ends were banged up or crimped and needed reshaping to make them round and not oval. I'm absolutely sure this happened at the factory and not from the shipping company because the box was in perfect shape. Pre-fit all of your pieces BEFORE you start installing them on the truck.

3. Flo~Pro uses band clamps instead of crush clamps. I've never used a band clamp before and I will probably never use another crush clamp ever again. They seal really really really well.

4. I was going to try and save my old exhaust system. I got the cat bolts off but couldn't get the down-pipe out without removing the cross-member. I gave up and got the Milwaukee sawzall out. The old exhaust system was out in 10 minutes after that. I cut the down-pipe just before the cross-member next to the transmission and made another cut just after the rear of the muffler.

5. I have small hands and so getting a hold of the down-pipe to attach it to the turbo wasn't too hard to do but I could see how a second set of hands would have made it much easier. The 4" down-pipe fit perfectly with room to spare. I noticed that they had dimpled the down-pipe just a little right where it goes by the flex joint on the up pipe. If they hadn't it would have been touch city.

6. I have a 2006 F350 Supercab longbed and didn't have to cut to size any of the new pipe. It all fit perfectly.

7. I left everything loose before I started tightening it all up starting at the turbo clamp. I used a small piece of wood on the cross-member as a spacer to keep the down-pipe off the cross-member while I started snugging everything up.

8. Once all tightened up I noticed that it didn't move near as much side to side as the stock exhaust system.


- As for how it sounds, at idle at the tail pipe I do notice that I hear the "whoooosh" of the turbo much more now. On the highway (at 2150 rpm) it's almost as quiet as the stock exhaust but there's a hint of a lower note to it. I do get just a minute amount of drone if I'm cruising 65mph but it's not the type of drone that sets up a standing wave inside your skull and drives you insane. And when you put the pedal to the metal then she comes alive and sounds gooooooood.

- I did lose a little oomph when starting from a complete stop but, once I get some custom SCT tunes I'm hoping that won't be an issue any more.

- My EGT's "seem" to be about 50*-100* lower than what they were before, but I need to drive it more to see if that's really what's happening.

Except for the crimped and out-of-round shaped pipe ends that obviously came from the factory, I'm pretty happy with this exhaust system.

2006 F-350 XLT FX4 SCLB 6.0L | TTY head bolts | stock EGR and cooler | blue spring FP mod | PHP Atlas 40 FICM tune | ScanGauge 2 & GlowShift 3-in-1 gauge (Boost/EGT/FP) | PMM coolant filter kit | Flo~Pro 4" turbo back w/muffler | stock tune

Last edited by Soledad; 08-26-2013 at 06:14 AM.
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post #2 of 11 Old 08-26-2013, 06:22 AM
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Tks for the write up, I am fixing to buy the same exact exhaust for my truck.

99.5 F250 7.3 (Sold)
2006 F350 6.0 CC LB SRW FX4
Pro Comp 2.5 Leveling Kit
New Premium FICM from Ed
IPR GEN 2 EGR Delete w/ Up Pipe
Flo Pro 4" Turbo Back w/muffler
Blue Spring Mod
SCT Livewire ts
Ag Street Tune by Eric
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post #3 of 11 Old 08-26-2013, 07:06 AM
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My experience with Flow-Pro though limited has been good as well. The band clamps are a big plus in my book. Having to buy band clamps when I installed my Magnaflow duals added substantially to the cost. I won't use anything but band clamps.
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post #4 of 11 Old 08-27-2013, 04:37 AM Thread Starter
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When I gave the truck it's first test drive with the new exhaust I had the windows rolled up and the A/C on because it was so freaking hot outside. I did stand near the tail pipe to listen to it idle but never rev'd it up or anything.

Well, yesterday, I had the windows down while heading out of town to get to the highway and heard it properly for the first time. Holy guacamole! That jet engine like "whoooosh/whistle" is addicting. It's not like a high pitched whistle that's gonna make your ears bleed, but more like....well.....I really don't know but damn I love it. It's not like any other exhaust sound I've ever heard.

And what's cool is that if you are easy on the pedal then it's not loud at all. But get hard on the pedal and it sounds gooooooood.

Oh, and one other thing to note is that I'm glad I installed this exhaust because I had no idea that mice had made one hell of a nest/bed just underneath the turbo. Lots and lots and LOTS of chewed up paper. The paper was so dark I just never noticed it when changing the filters or putting on my coolant filter. I'm really glad the engine didn't catch on fire.

2006 F-350 XLT FX4 SCLB 6.0L | TTY head bolts | stock EGR and cooler | blue spring FP mod | PHP Atlas 40 FICM tune | ScanGauge 2 & GlowShift 3-in-1 gauge (Boost/EGT/FP) | PMM coolant filter kit | Flo~Pro 4" turbo back w/muffler | stock tune
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post #5 of 11 Old 08-27-2013, 07:13 AM
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Yeah Mitch helped me install mY Flo-Pro system and I'm Sure he's talking about when we did it.. Its a nice system for sure
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post #6 of 11 Old 09-03-2014, 05:58 AM
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Ok, I know this thread is old but finally I ordered my flo pro exhaust this morning. Can't wait to get her installed and hopefully this weekend.

99.5 F250 7.3 (Sold)
2006 F350 6.0 CC LB SRW FX4
Pro Comp 2.5 Leveling Kit
New Premium FICM from Ed
IPR GEN 2 EGR Delete w/ Up Pipe
Flo Pro 4" Turbo Back w/muffler
Blue Spring Mod
SCT Livewire ts
Ag Street Tune by Eric
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post #7 of 11 Old 09-13-2014, 05:50 PM
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Did you see any increase in mpg's or power with the turbo back system
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post #8 of 11 Old 09-15-2014, 02:32 PM
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I may have just a little increase in mpg's. I don't think I can really feel a difference in power but as far as turbo lag, there is none. I love the way it sounds...

99.5 F250 7.3 (Sold)
2006 F350 6.0 CC LB SRW FX4
Pro Comp 2.5 Leveling Kit
New Premium FICM from Ed
IPR GEN 2 EGR Delete w/ Up Pipe
Flo Pro 4" Turbo Back w/muffler
Blue Spring Mod
SCT Livewire ts
Ag Street Tune by Eric
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post #9 of 11 Old 09-15-2014, 08:02 PM
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I ordered a 4" turbo back dual exhaust kit and can't wait to put it on and to hear how my 6.0. Sounds
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post #10 of 11 Old 09-15-2014, 08:40 PM
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I had a 4" Flow-Master put on my truck back in 08 or so, still in great shape, 5" downpipe I think. I had issues with a bad vibration/noise/ etc,etc for quite some time, happened a lot when turning, at one time thought I had bearing issues, asked a mechanic about it, thought front wheel bearings, those were replaced for about $1000. Turns out the damn band clamp wasn't holding and the ex. pipe was falling out of the downpipe onto the crossmember and making all kinds of rattling, vibrating noises at odd times.

Hell, expensive fix, a good H.D. U-clamp took care of it, watch those band clamps!!

04.5 F-350 KR. UCF Heads, ARP Studs, 6.4 Pushrods, KC Stage 2,SCT X4, BPD Air-Oil Cooler w/Bypass Filter, EGR delete, Coolant Filter, 4" Flow-Master exhaust,AEM Brute Force HD Intake, Atlas40 FICM, DC Power 190,BPD Scan-Gauge II, EGT/Boost/Fuel Gauges,Front Level Kit, PowerStop Front Brakes, Sinister Y-Pipes & R.R Fuel System,BPD Billet Wtr. Pump, '97 Fan Clutch/ BPD Adapter. GoGo D.D. Solenoid.WPE White Rain,W.Street,W.Tow, TSD-SPD. Riffraff boots, Cold Side Pipe.
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