need power!
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Joined: Oct 2003
Posts: 18
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From: pittsburgh PA
need power!
Hey everyone,
I am planing on modifying my 03 f250 psd super cab 4x4, I am puting on a 4 inch exhaust that goes to dual 5inch stack through the bed. what type of down pipe should i use? I do tow a 21 foot trailer almost every day around town driving. Also want to add chip/tuner, intake, possibly Nitrous and or propaine injection. I am hoping to find the best of each, price is not a factor as i will do a little at a time. I would like to be able to smoke all the tires in 4 wheel
and be able to have some fun with sports cars lol. thanks for any help
I am planing on modifying my 03 f250 psd super cab 4x4, I am puting on a 4 inch exhaust that goes to dual 5inch stack through the bed. what type of down pipe should i use? I do tow a 21 foot trailer almost every day around town driving. Also want to add chip/tuner, intake, possibly Nitrous and or propaine injection. I am hoping to find the best of each, price is not a factor as i will do a little at a time. I would like to be able to smoke all the tires in 4 wheel
and be able to have some fun with sports cars lol. thanks for any help
Posting Guru
Joined: Feb 2004
Posts: 2,365
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From: IOWA
Well, as I'm sure everyone on here will tell you, get gauges first so you can monitor what your truck is doing. You don't want to spend all that money on mods and then blow the engine or tranny. Gauges would be the biggest thing, and then what you have listed sounds good. Regarding the downpipe, if you plan on putting on a lot of HP, go with the 4". There is a great thread about going from a 4" to a 3.5" downpipe that Mudinford has explained well how to determine which pipe to use.
I'm sure more knowledgable posters will give their suggestions.
I'm sure more knowledgable posters will give their suggestions.
Post Fiend
Joined: Aug 2002
Posts: 5,324
Likes: 1
From: Denton,TX
Don't forget to make some upgrades to your transmission to handle all that power.
farmb0y, this is one case where a 5" exhaust could show some benefits. Since he's adding propane, which will add about 100 rear wheel HP, he could be over 450 HP with all those mods.
farmb0y, this is one case where a 5" exhaust could show some benefits. Since he's adding propane, which will add about 100 rear wheel HP, he could be over 450 HP with all those mods.
Posting Guru
Joined: Feb 2004
Posts: 2,365
Likes: 0
From: IOWA
Yea, good point. I'm always hearing about 4" exhaust I never really thought about going any bigger. But for that kind of horsepower you would need a way to get rid of the exhaust and keep your EGT's down, and the 5" should do it. Or go dual stacks out of the box behind that cab, that always looks cool. 
