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View Full Version : obs do?wnpipe questions?

Mach2
12-07-2009, 09:18 PM
Hey guys, im trying work out a deal to buy my neighbors 97 powerstroke and i want to put a five in super duty exhaust on it but i no the super dutydown pipe won't work on the obs engine. do you guys have any suggestions?
RubberDuck
12-08-2009, 03:12 AM
Get a 3" obs down pipe and get an adapter from 3" to 5". A little welding and your good to go.
FordGuy24
12-08-2009, 05:54 PM
^^^^its just that simple
Mach2
12-08-2009, 06:32 PM
thanks!! thats wat i was figurin on doin. i jus didnt know if there was someone that made one for five in. Thanks
RubberDuck
12-08-2009, 06:58 PM
Dale at Tymar performance sells one that bells to 4" after it passes the firewall. That may be the one you want to get. And it will most likely be the least expensive. But unless something is changed, you gotta call him. You can't order over the internet. His site only has his # on it. But I promise you will be glad you called him. He's a super great guy to talk to, and very helpful. And he has everything you could ever want for a powerstroke.
DuraDan
12-10-2009, 01:36 PM
3" is the max u can fit in the OBS trucks, I have a 97 F350 and I put a 3" to 4" system from MBRP and it was a bich to fit the 3" down pipe in, hopefully you have an exhaust shop put it in, or have a 5 ft bar to bend in the firewall (what i did)... p.s. no need for a 5" system, 4" frees it up plenty
RubberDuck
12-10-2009, 02:25 PM
Good point Dan. I actually bought a Port-a-power tool with the expanding duck bill. It made moving the firewall back a snap. Well worth buying for me, cuz I do alot of them.

So to the original poster, you most likely will have to bend your firewall back just a fuzz to clear the pipe. If you need help on how to do it, let me know.
wwm
12-22-2009, 02:00 AM
get an pnematic hammer and go at it
97rattlebox
12-23-2009, 11:27 AM
Yep, beat and bend the crap outta that firewall. Plenty of clearance is key. Otherwise all it takes is a worn body mount or a good bump on the highway and the downpipe will rub, causing one helluva nasty noise!
wwm
12-24-2009, 02:29 PM
haha had that on mine my buddy couldnt talk on the phone in the back seat cause of the noise
smokenhalfton
02-25-2010, 08:20 PM
o do a body lift i can fit 4in 4 1/2
wwm
03-01-2010, 09:58 PM
thats true but I dont like body lifts personally but that is a good idea
The Hill Billy
03-02-2010, 01:40 AM
I just used a prybar and a bfh.