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97 downpipe

2496 Views 13 Replies 9 Participants Last post by  Mr. Neutron
So I see a ton of aftermarket exhausts for sale for my 97 f-250. I can get a 4" or a 5", but the downpipes are all 3". My question is can you fit anything bigger than a 3" downpipe on this year of truck?
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I wouldnt even bother changing it;. The stock works good enough/ its been dyno proven.
Dude have you seen a stock OBS DP? You're thinking of the SD exhaust....

To the CSWASS yes you can put a larger than 3" DP on and some guys have done it. The challenge is getting it passed the firewall/floor pinch weld. Some guys do a body lift and a significant amount of cut weld of fore noted. Greater then 3" is really not needed unless you are running huge ponies. 3" DP and stock exhaust including stock muffler will support 400-450 HP....I say save your dough and get a 3" DP into 4" and clean out your cat and use as a resonator into stock exhaust for now. Then when you need to replace your stock exhaust go to 4" system.

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