depending on the downpipe you my not need to change anything but some require changing the cab seem. i noticed a decrease in EGTs and seemed to have more throttle responce also noticed more exhaust noise.

i'd rip out the old dp in a hurr either way

I was reading something about this cab seam needing to be pounded. Thanks for the input.

Thanks for the input joebob

Thats the plan, I'm waiting for you to hook me up with a 3" bus dp though ;)

Do the Downpipe... Factory downpipe is so restrictive, its pathetic...

You will need to make room for the aftermarket downpipe. Nothing a crowbar can't take care of. If you aren't willing to do that, rent a port-a-power and make room for it that way. It's easier than you think.

Do you think a DP would be more affective than a full exhaust minus the DP? IE, should I do a DP then do the rest of the exhaust?

You can do that If you want...

IMO, Exhaust kits are cheap enough, just do it all at once...

That would certainly be optimal I suppose... I'm trying to segment my mods though and share them with my Volkswagen haha

Exhaust, intake, gauges, chip... Then drive it and smile.

Thats the plan :tu:

what is the best way to "adjust" the firewall after the pipe is installed and REALLY DONT WANNA TAKE IT BACK OUT?