Getting started....

[jimmyp]

I am planning to put exhaust under my 2000 7.3. I am looking at doing a 4" system. I have heard that on the fords it is necesary to modify the firewall or do a body lift to clear a 4" down pipe? also this truck is stock other than either a 70 or 80hp superchip, will I gain anything from a cat back system or should I just go from the turbo back and be done with it? I dont have to be concerned with emisions so the cat isnt something I have to have, but I would rather not go to a strait pipe.... any help would be awsome.
Jim

[jesilvas]

Turbo back is best if you wanna do the whole system. No reason to really do that. As long as you get rid of the cat and just get a Walker BTM or other straight though muffler.

[7.3Lariat]

4" downpipe fits just fine. And yes if you are going to do it do a full exhaust not cat back etc.

[dannanw]

Originally Posted by 7.3Lariat

And yes if you are going to do it do a full exhaust not cat back etc.

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[EdgeXXL]

I have a 2000 extended cab and put the MBRP 4" turbo back system on it. It fits great and no modifications were needed. The only thing I did was remove the factory heatshield under the passenger floorboard as the pipe was very close to hitting it. On afterthought I should have just taken the truck to my local exhaust shop and had them install it. They only charged $100 to do it and it took me most of a day to do it myself lol.

[SCstroker]

Whatever system you go with, just make sure you have a buddy. That way, you can feed the down pipe up and he can clamp onto the turbo. Total time was 1 1/2 hour for the MBRP system on my truck. Back the v-clamp nut, I think it is a 7/16 deep socket, off to almost the last tread. It is attached to a t-shape bolt. Lift bolt up and out of the clamp. Use some type of tool to loosen each of the three v clamps. Cut old system down pipe with a sawzall. Cut old system, under truck, before muffler. Drink lots of beer, after install, not before!!

[jimmyp]

thanks for the help guys, the truck doesnt have a cat so for the moment Im gona cut out the muff and straight pipe it with whats there. I will be going with a full four inch system here very shortly, havnt decided whether i will be using a muff or not when I get the system will decide after i hear it run with the 3.5 straight.
after the exhaust I plan on swapping out the superchip for either another chip or a tuner and put an intake on it.
just curious...... what kind of numbers will these 7.3s turn out with bolt on and plug in parts? i drive this truck every day and dont intend to mess with the turbo or injectors for a while......
thanks
Jim

[jesilvas]

Chip, exhaust, intake can be a little over 325? Just a number but it sounds right.