Exhaust? 4in. or 5in.

[Lima-18]

I know this has been answered before but I can't find the thread. I have an 01, 7.3, CC, long bed, Afe intake and a Super Chip programer. I am looking into after market exhaust systems. I am looking for pros and cons to both 4in. and 5in. turbo back systems (no muffler). Also if you know of anyone offering holiday pricing, that would be appreciated, or just a good place to buy. I also don't want to limit myself to future upgrades. Thank you in advance for any information you are willing to share. Happy Holidays

[757kevin]

i have a banks 4 in turbo back system. it was on my truck when i bought it. im pretty happy with it. from what i understand anything bigger than 4in down pipe wont fit between the motor and firewall. i heard that 4in is fine but if you want it to be loud then go with the 5in. i have the banks 4in with a muffler and its plenty for me. i am going to take my muffler off and see what it sounds like. hope this helps ya.

[MSTR-P]

Just depends on what you want your end result to be. When you say "future upgrades"...what do you have in mind? A 5" will give you a deeper tone, but a 4" can just about any amount of horsepower you will throw at it.

[Lima-18]

I have looked at Banks. They seem to be on the high end of the price spectrum. I would like a deep sound. That doesn't break the bank. I am also looking at installation pros and cons. I guess a shove in the right direction. MBRP? DIAMOND EYE?

[Stroker7.3]

farm boy diesel has good prices for both 5 or 4 inch. not sure on quality or anything though

[blue99stroker]

a few folks have had issues with the mbrp kits. the downpipe occasionally hits the firewall. but most seem to be happy.
i bought 4 inch diamond eye and i really like it, install was easy and i did it by myself in my driveway. been on a year now and it still looks new.
4 inch is fine up to like 450 hp.
5 inch is just a little deeper sounding no performance gains over 4 inch.
so its entirely up to you.

[adams01]

i bought my 4 inch diamond eye for like 265.00.i got it through auto parts warehouse i think.i like it.

[Six0~Stroker]

5"!!!.....

[Lima-18]

Leaning toward the 5in. for the sound. I am just unsure what manufacture to go with. I appreciate all the positive feedback. I was sold on the MBRP but the firewall issue concerns me.