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post #1 of 15 Old 05-06-2008, 03:21 AM Thread Starter
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Down Pipe

I got a question. What is the easiest way to change the downpipe on an OBS? If you have any hints that would be great. Thanks yall.

Drew
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post #2 of 15 Old 05-06-2008, 04:34 AM
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Get a highpowered sawzall (corded otherwise you need alot of batteries) with a huge strong blade (I used a 12" long by 1/16" thick blade).
Unbolt the downpipe off the turbo and cat. Cut the "cobra's head" (curved top) off located where the pipe connects to the turbo. Once it is cut off then you may be able to let it drop out. I don't remember exactly, but if not you might need to cut it once more from under the truck.
Good luck it takes some time!
Mark

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post #3 of 15 Old 05-06-2008, 04:41 AM Thread Starter
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Thanks man Ive never done this so I need all the help I can get.

Drew
99 SD 6SPD manual

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post #4 of 15 Old 05-06-2008, 05:05 AM
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No you dont need to cut cobra head --after you un bolt it -hit the bottom of the bend (from under the truck ) up wards --not hard -then cut -with long blade the bend then as high up you can from undernieth then move out of the way-- it will just drop out
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post #5 of 15 Old 05-06-2008, 05:59 AM
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where can i get a new downpipe for an obs
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post #6 of 15 Old 05-06-2008, 06:37 AM Thread Starter
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Quote:
Originally Posted by dzlpwrd View Post
where can i get a new downpipe for an obs
MBRP sells on. There is another one that I found that has an aluminized down pipe for $85 plus shipping but I dont have the website at work. Send me a PM and I will get it to you when I get home from work.

Drew
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post #7 of 15 Old 05-06-2008, 07:48 AM
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rpm outlet has one..... use a plasma cutter to get the stock one out and use a port a power to push out the fire wall to make room for the new one.... down pipe is awsome when u get it on.

1996 F-250 EX 7.3 now 6.6 DMAX - Pulling truck.

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2001 F-250 7.3 - Not sure the purpose... it was cheap.


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post #8 of 15 Old 05-06-2008, 11:34 AM
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Rageingbull have you done a downpipe on an OBS truck before, its impossible to get the pipe out. I found that cutting the cobra's head off was the best solution making the job easier.
Also I used the sawzall to cut tabs in the factory weld seem and used a 6ft. Crow bar and a block of wood to bend them over to make room for the new Round pipe.
Good luck!

1996 Powerstroke
133,000 and counting...

The Works:
~ Ported Turbo & 1.0 Hot Housing
~ Turbo blanket
~ Ceramic Manifolds
~ Wrapped Up-pipes
~ Banks Technicooler
~ 3" Superduty Plenums
~ Custom 6" AEM Intake
~ Tymar 3-4" Ceramic DP
~ MBRP 4" Exhaust
~ BB Mod
~ PHP Tunes
~ Transgo Shift Kit
~ DIY 140v IDM mod
~ Electric Fans
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post #9 of 15 Old 05-06-2008, 11:50 AM
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Cutting it from top and bottum will make it easiest to get out.....

Then you will be able to see where the new one will need to pass through.... cut the pinch in the cab a few times then it will be easier to bend down and back. I used a porta power jack and spreader head with a small peice of 2X4 for backing against the bellhousing of the tranny.

And I have NEVER heard of an OBS downpipe easily falling out...

They are somewhat of a PITA... but are WAY worth it.

Things will ALWAYS be easier with 2 people while working with exhaust.

97 F350 7.3 Off-Road Build Locked on 42's

08 2500 Cummins
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post #10 of 15 Old 05-06-2008, 12:46 PM
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sorry guys missed the obs part lol dont kill me lol just thought 6.0 superduty ps what is a obs
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