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View Full Version : Installed a MBRP 4" Exhaust pics and vids

Roush PSD Interceptor
05-25-2012, 07:35 PM
Installed the 4" MBRP.
Well it took longer than I expected but it's on
and everything is tight.
Drove it into town and not one rattle but I'm checking all
the clamps and clearances later any way.
Fighting the downpipe band clamp took longer than anything.
The factory installed position is in the back so it's hard to get to
and once loosened the ratchet binds into the firewall insulation.

So after trial and error the band clamp kept rotating down instead of up where I could get to it. I made a heavy wire hook that let me pull
it back up over the top. I used my 18V Li-Ion Milwaukee Sawzall
to cut the down pipe off at the bell housing.
Then a cut behind the Walker Big Truck Muffler to remove old system.

Started at the end of the downpipe fitting
pieces together per diagram installation instructions.
Cut the pipe before the muffler delete short about 14".
Started at the tailpipe adjusting and tightening clamps working toward
the front. The downpipe clamp was the last one tightened.

Bent the transmission / passenger floorboard heat shield a little for
clearance issues but not much.

I had dropped the pyrometer sensor fitting down in the engine
fighting the downpipe clamp but luckily found it by the driver's
front tire. Removing the MAP sensor from the top of the A/C
evaporator box made it a lot easier to access the limited space to the downpipe clamp.

Vid of system before removal
7.3 F250 Old Stock System with Walker Big Truck Muffler - YouTube

Exhaust sound before tear-down.
7.3 F250 Walker Big Truck Muffler Sound - YouTube

Out with the old, BTM - Big Truck Muffler by Walker.
http://i749.photobucket.com/albums/xx131/josephaholmes/20120525_105622.jpg

Wiping everything down before paint.
http://i749.photobucket.com/albums/xx131/josephaholmes/20120524_101314.jpg

Murdered out MBRP
http://i749.photobucket.com/albums/xx131/josephaholmes/20120524_131353.jpg

Stock downpipe vs 4" MBRP
http://i749.photobucket.com/albums/xx131/josephaholmes/20120525_090817.jpg

Pilot hole for pyrometer fitting
http://i749.photobucket.com/albums/xx131/josephaholmes/20120525_091308.jpg

11/64th hole before tapping
http://i749.photobucket.com/albums/xx131/josephaholmes/20120525_091418.jpg

Starting the tap
http://i749.photobucket.com/albums/xx131/josephaholmes/20120525_092321.jpg

Tight fit
http://i749.photobucket.com/albums/xx131/josephaholmes/20120525_092518.jpg

Seated pyrometer fitting
http://i749.photobucket.com/albums/xx131/josephaholmes/20120525_092919.jpg

Downpipe and band clamp tightened after entire system under the truck is tight starting from the tailpipe forward
http://i749.photobucket.com/albums/xx131/josephaholmes/20120525_114717.jpg

Note band clamp is turned so ya can get to it instead of being against the firewall from factory.
EGT sensor installed, nicked the paint-job, touch up time
http://i749.photobucket.com/albums/xx131/josephaholmes/20120525_114855-1.jpg

Wife shot the after sound vid for me.
7.3 F250 MBRP 4" muffler delete - YouTube
Bdons-SD
05-25-2012, 10:42 PM
sounds like mine! ha ha, i wish i painted mine black. The guy I traded for mine owned the shop and installed it for me in about 45mins.
Roush PSD Interceptor
05-26-2012, 10:58 AM
Looks like I will need a heat shield for the spare tire,
the over axle pipe is very close @ the mounted spare.

There is a bracket there for it, I just need to make one
out of sheet metal.
06VT365
05-26-2012, 11:49 AM
Nice, downpipe was the hardest on mine too!

Do you just have pyro in downpipe? or do you have manifold and downpipe to see the delta in temps?
Just curious as I have thought about that setup.
Roush PSD Interceptor
05-26-2012, 06:52 PM
Just the downpipe on mine,
I've heard the manifold pyro is a
more accurate measure of EGTs.
06VT365
05-26-2012, 10:19 PM
Yeah, supposedly so. I have mine in the manifold currently. I dont know if one is better than the other really. I know temps should be a couple hundred degrees cooler in the downpipe so as long as you keep that in mind and know what the max temp is there compared to the manifold.
westtnfx4
05-26-2012, 11:07 PM
Great write up and it sounds alot better!! Nice work.
SUPERxDUTYxV10
08-07-2012, 09:52 PM
Sounds really good now my 3 yr old wants to watch it again?
UTAHFORD
08-07-2012, 11:05 PM
Sounds really good now my 3 yr old wants to watch it again?

Sweet man lol teach em while they are young
SUPERxDUTYxV10
08-08-2012, 12:44 AM
Sweet man lol teach em while they are young

Yeah and he always tells me I need a diesel truck. Lol
crackerjack
08-08-2012, 10:16 AM
great write up man, and plenty of good pictures.. i wish i could watch the videos but the net's to slow here
Midnight Smoker
08-08-2012, 10:33 AM
Yeah and he always tells me I need a diesel truck. Lol

Go on and make him proud! :wave:
Midnight Smoker
08-08-2012, 10:38 AM
Truck sounds much better, a 7.3 was the first diesel I ever got to drive, loved'em ever since
Roush PSD Interceptor
08-09-2012, 09:16 PM
Truck did great on our 1500 mile round trip to FL and back.
The new tires we put on during our vacation are actually louder than the exhaust
at speed.

Hit up Winter Haven, Palm Bay and Daytona Beach then back home.
After I get over this severe ankle problem I'm going to total up
the fuel mileage from the trip with the new 4" MBRP.

http://i749.photobucket.com/albums/xx131/josephaholmes/DSC02500.jpg
http://i749.photobucket.com/albums/xx131/josephaholmes/DSC02501.jpg