4" or 5"

Harvick · 05-16-2007, 04:46 AM

On my 03, I'm finally looking at doing some mods like I had on my 7.3 PS. First exhaust, but I'm looking for a throaty sound. I put a 4" Jegs on the 7.3 which gave more of a low rumble, but the cost was reasonable.
I've seen sum people say a AFE off road exhaust? Location?
Will the 5 sound deeper and can I use it w/o power mods?

myojunk · 05-16-2007, 06:15 AM

i did a combination of both, 4 and 5. 4" front pipe and 5" after that. since there is no good aftermarket exhaust for a reg cab, its all for a 06 crewcab dually. i also lost the flange and went with the 4-5 adapter. it was kinda a PITA, but i like it.

GoldDigger · 05-16-2007, 06:33 AM

I put a 4" downpipe with a 5" Straight after that. No kitty, no muffler. I like the way it sounds....lots a turbo spool.

**TYREBOYZ_DEMAXIN** · 05-16-2007, 06:41 AM

i have a 5" T/B and i love the sound,it screams under throttle..

Harvick · 05-16-2007, 03:24 PM

So a 5" w/o a muffler sounds good? I tried it on the PS and it just did not sound right.

GoldDigger · 05-16-2007, 04:24 PM

I like the way it sounds. My wife thinks it sounds like a space ship(her description.)

duramaxsandwich · 05-16-2007, 04:36 PM

i've noticed a big difference in sound in the lb7 with the old turbo compared to the lly/lbz's with the vvt turbo. the newer trucks sound like a jet taking off, while the lb7's have a deeper sound to them. so a 5'' on a lb7 will sound different than a 5'' on a lly/lbz

myojunk · 05-16-2007, 06:06 PM

Quote:

Originally Posted by Harvick

So a 5" w/o a muffler sounds good? I tried it on the PS and it just did not sound right.

i suppose its personal preference. personally, i dont like the way it sounds. but there again, i dont like the way any duramax sounds (i do like the duramax better than the cummins though). i think the PS sounds better than any other diesel i have heard when straight piped.

one of the main reasons i went with a 5 is because i couldnt stand buying an aftermarket exhaust that was only 1/2 inch bigger than what i already had. i felt at 1 and a half inches, i got my moneys worth.

redneck tom · 05-17-2007, 07:02 AM

im selling my 5" straight pipe off my 03 CC SB if interested PM or e-mail me for details.
Tom

duramax69 · 05-17-2007, 07:56 AM

i got an LB7 with a 4" straight pipe and love it. was wondering what it would sound like with a 5" instead of a 4". anyone have a straght piped 5" LB7 tell me what you think and what it sounds like vs. a 4".