down pipe/ up pipes

[ssdeuce]

alright i've heard that a true 4" down pipe is better than a 3.5" which is what mbrps exhaust came with just wondering where i can get the real 4" pipe from and if anyone knows if anyone sells better aftermarket up pipes for the 6.0 seen for 7.3

[dhanna6powerstroke]

I have a Silverline 4" turbo back but not sure if it is a true 4". It was definetely bigger than the stock downpipe.

[ssdeuce]

found most are 3.5 goes to 4 after the cat

[bigwhite6oh]

Originally Posted by dhanna6powerstroke

I have a Silverline 4" turbo back but not sure if it is a true 4". It was definetely bigger than the stock downpipe.

if i were to guess, id say its a 3.5, judging by the way it slips into the first 4" piece. i wanted to measure it when i put it in, but after fighting with the stocker all night i never wanted to take it apart again

[ssdeuce]

maybe i read it wrong and they are all like that

[dhanna6powerstroke]

I know it is 4" before it gets to the cat. I like the exhaust, very well built.

[Blaster7Romeo]

my Magnaflow came with a 4 in down pipe it took some hitting with a hammer to get it in but once it was in it fit just fine and had plenty of room

[cj41foley]

I just got my 4" down pipe and cat delete in from RPM outlet, I already have 4" after the gutted cat with a 5" 90 and a 6" tip in front of the rear tire, now it's gonna be true 4" all the way with no kitty and the muffler has been gone. Should be very very loud in front of the rear tire.

[ssdeuce]

oh it is mine right now is 3.5 down pipe 4" after cat delete pipe to 4" 90 and 5" tip in front the rear tire very loud very awesome im just wondering if id get anymore out of the truck and lower egts with true 4"

[bigwhite6oh]

Originally Posted by ssdeuce

im just wondering if id get anymore out of the truck and lower egts with true 4"

just guessing, id say your egt's might be a little lower, but if anything you would see a little more lag out of a bigger DP. maybe someone with more experience could chime in, but thats just my