I'm getting ready to order a new Diamond Eye exhaust for my F350. I've used Diamond Eye before and felt that they are a good product especially for the price. I can get a new 4" turbo back no muffler exhaust for $249 shipped and a new 5" turbo back for $360 shipped. Is the 5" worth $100 more. I know that both use a 4" down pipe so I'm wondering if the extra inch from the down pipe back actually benefits anything.

 

the 4" will be fine...I believe i read somewhere that the 5" is for big hp

 

I think the 4" will be fine too. I have a theory that no matter what size your exhaust is from the down pipe back, its really only as good as your down pipe. So my theory is that a 5" would be just more for looks since the down pipe is 4". But that is just my uneducated theory so if any of you guys know that I am wrong please let me know.

 

4", mine sounds great with no muffler.

 

4inch here and love it even before my stacks

too big loses back preasure its mainly for high performace like serious modding like crazy style

tell me if im wrong, i just enstaled a 5in on my friends durmax who is going crazy with stuff

 

here is my 5". i custom made it. bought the downpipe, clamps hangers straight pipe and diamond eye axel over piece. took some 2400 black heat paint to it. basically its 4" downpipe, 3 feet of 4" to get past axel cross member, then from there all 5" round stock to the back. did all that for 240 bucks

 

I just ordered a 5in MBRP cause I hear the sound is deeper. I say go with what makes you happy.

 

To be honest, my 5" sounds like absolute garbage. I'm going to swap it back out to a 4" and have not decided on straight pipe or muffler yet. The sound is "sloppy" to say the least, and there is no performance gain on a moderately modded truck. I'm eating through right rear shocks as a result of the 5", and my spare tire now resides in my bed due to burning. Total bad idea for me.

 

I had a 4" no muffler diamond eye on a Chevy 6.5 diesel that I had and it sounded really good so I think that's what I'll go with. I've never heard a 5" but I'm thinking it wouldn't be worth the extra hundred bucks.

 

I have 5" on my dually from the down pipe back and like it. I cant compare it to anything because i bought it like that, but i do know i can pull 15,000 lbs and not worry about EGT's and i still have the stock air intake

 

I have the same truck except mine is a crew cab. You wouldn't happen to have any pics of your exhaust would you?

 

no i dont but i can try to get some tomorrow in the day light.