Originally Posted by Bad Superduty
I have heard, for some modifications, the cab must be removed on 08's. Couldn't remember for sure but thought it is required if aftermarket injectors are installed. Is this correct?
Also heard DP would also require cab removal or at least tranny removal?
I have heard both on injectors, that the cab needs to be removed and/or that it can be done without removing the cab. So I can't give you a clear answer, but after doing with the up-pipe with the cab on, you can bet that I'll be doing the injectors and whatever else with the cab off
it will save you a world of headaches, stripped bolts, and busted knuckles.
Speaking of the downpipe, I have had looked at it first hand (had to remove it to get the up-pipe off) and there is nothing more that can really be done about it, its 4", mandrel bent, and its all already pinched down on the end because its so tight between the tranny bellhousing and the frame.
Now if you want to talk about where some performance can be gained, its in the up-pipes and exhaust manifolds