Stock down pipe
Logistics Pro
Joined: Jul 2002
Posts: 4,821
Likes: 19
From: South Dakota
Originally Posted by 444dieselrod
are we talking about a SD truck also??? the stock DP is already 3" round not crushed like the OBS truck. IMO should be good to prolly 350 HP before EGT problems arise.
Diesel Rod
I have exactly 1/2 the smoke due to the 4'' SS Magnaflow system that I installed compared to the stock system with my 60 hp tune running.
I borrowed my neighbors sawzall and cut the stock system in 5 places, 1 cut on each side of the stock muffler, 1 before and after the tranny mount, and 1 close to the rear shock.
IMO the 2 cuts that my Magnaflow instructions said I need just were not enough.
My new 1 piece DP was a bear to install as I did not have a helper, after I got it clamped up right, it was just a matter of getting every thing lined up and clamped down.
Senior User
Joined: Mar 2003
Posts: 428
Likes: 1
From: Hot Springs Village, Ar
Originally Posted by rollnthunder_76
I remember reading somewhere what was involved in taking out the stock down pipe and i have spent a good long while searching for it but cant find it.Im also wanting to know can it be taken out as one piece(the down pipe that is).I know alot of people cut them out.Thanks
Senior User
Joined: Nov 2001
Posts: 316
Likes: 0
Originally Posted by RedStroker6
well, thats the way its got to be done. maybe i used the wrong word. maybe not "firewall" per say, more like, the insulation/heat shield
