I am looking at the MBRP 4" exhaust for my 2001 Chevy I dont know a lot about MBRP. Are they a good company and will I get great sound out of the exhaust. It will be from the down pipe back no muffler.
Some people may argue differently, but a 4in exhaust is a 4in exhaust 'dunno; The sound isn't going to be much different from each other when comparing straight to straight basically.
But yes, MBRP is a good quality exhaust from my experience. I've installed a couple sets myself and they're not bad.
I've got a set of Diamond Eye 4in duals on my LB7 and I won't lie-good exhaust, royal pain to install... GrrRRrr
My last two exhausts I have put on my own trucks have been MagnaFlow 5in. By far the easiest installing and best fitting out of the box I have ever installed.
What is the big difference between the 4" and 5" besides the size.
Although some do say 4” for performance and 5” for sound.
I'd buy Flo-Pro if I were to redo mine. Mine is mbrp, and I do not like that they are sleeve fit rather than clamp unions. can be a bit of a pain in the ass to separate them if/when you go to add a muffler/resonator
you'll get more exhaust noise than you bargain for with a straight pipe on a LB7. personally I would run a 30" FTE resonator where the muffler would normally go to knock the drone down, which will be significant on a LB7, but not make it much/any quieter
I put a 4" MBRP on my 04 didn't fit that great, drones when towing. Sounds fine when no towing though.
I run the 4 inch. Good fit,has a good sound
02 gmc sierra 2500hd crew cab short bed
3" zone kit
285/70/17 nitto Terra Grapplers
17x9 Raceline 930's
3" turbo horn
PPE boost valve
MBRP 3" downpipe
MBRP 4" exhaust
boost auto tow mirrors (dual function) Edge CTS2 with EAS EGT probe
the mufflers that come in the kits are trash, may as well throw those in the scrap bin. I'd spend the money on either a FTE resonator or a MBRP "quiet tone" muffler. I have both a 12" FTE resonator and then the quiet tone muffler and I'm thrilled with the result after being straight piped for 5+ years. you tell yourself it doesn't drone in the cab, but holy hell the difference you notice when it's not there anymore. my LBZ still has a nice low idle and it's definitely not much quieter than the straight pipe was at idle, but off idle and under acceleration it is somewhere between stock and straight piped, with zero drone in the cab.
if you want more volume, run just a resonator, won't cut the sound down by much but the lack of drone is worth every nickel
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