My bother in law has the LLY and that thing whistles like a jet motor, my father in law has the LB7 and it is a low-loud rumble, both are straight piped fromt he turbo back, but my brother in law has 5" exhaust and my father in laws is 3", The LLY has a programer, and a cai, all my father in law has is a k&n air filter, Can we get the LB7 to sound the same? And how can we do it? thanks
yes just put a 5" on the lb7.On my lly with a stock pipe made into a straight it whistled real loud,i even had guys wondering if i was running twin turbos.then i put a 5" turbo back magnaflow exhaust on and it really rumbled under full throttle,but then i switch to a dual 4" silverline turbo back exhaust and put the 5" on my 06 lbz.ps the 5" sounds the best.
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Last edited by TYREBOYZ_DEMAXIN; 02-20-2007 at 01:55 PM.
My bother in law has the LLY and that thing whistles like a jet motor, my father in law has the LB7 and it is a low-loud rumble, both are straight piped fromt he turbo back, but my brother in law has 5" exhaust and my father in laws is 3", The LLY has a programer, and a cai, all my father in law has is a k&n air filter, Can we get the LB7 to sound the same? And how can we do it? thanks
quick question what exhaust does your brother'n'law have
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My dad has a 05 powerstroke with a 4" turbo-back straight and when it is idling the turbo is really loud like a jet. I heard that on the duramax that it will never whistle like this. I have an LBZ and was wondering if a 5" turbo back straight would make it whistle really loud like this?
__________________ 2007 White Chevy Silverado HD LBZ, CC, SB, 4x4, suspension maxx torsion keys for 3" front lift, 20x10 Moto Metal 951C, 325/50/20 MT Baja ATZs, escalade handles, 5% tint all around, no muffler, 5" tip, escort 8500 radar detector
I installed a AFE air box on my lb7 and it really made the wistle stand out. Did not really notice anything after the turbo back exhaust. The air box made a difference. Towing heavy at 70mph with the passenger window open you can really hear the high pitched wistle. SOUNDS AWESOME.
Keep in mind LB7's had a fixed vane turbo un like the variable one in the newer models. The 6.0 powerstroke is a different animal all together but at least my LB7 still pulls strong with 110k miles on it and still gets better fuel economy.
My dad has a 05 powerstroke with a 4" turbo-back straight and when it is idling the turbo is really loud like a jet. I heard that on the duramax that it will never whistle like this. I have an LBZ and was wondering if a 5" turbo back straight would make it whistle really loud like this?
yes it will whistle if you install the 5" turbo back with out the muffler that comes along.like i said i have a 06 lbz and i installed the 5" magnaflow with out the muffler that came with it and it whistled,so installed the muffler and that took care of that problem.it sounds mean with a 5" and i love it
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Yeah I have had buddies ask me if I have an extra turbo under the hood...all it is for exhaust is the 5 inch straight back with the lb7 engine....Give the throttle a punch and it will put a smile on ur face!!
you got to love the sound of a 5" exhaust ,i noticed with the muffler on it cuts the whistle and it grummbles a little bit when it idles,i think i like it better that way.
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i live in california, if i replace the down pipe and remove the catalytic converter would that have an effect on the computer, or make the check engine light come on?
__________________ 2003 LB7 with Allison reg. cab long bed 4x4 banks exhaust, edge ez, k&n fipk, isspro gauges, fs2500 bypass oil filter, banks big head, pml tranny pan
No it shouldnt. I cut right behind the cat and knocked all the packing out then cut out the muffler and it made it quite a bit louder plus u can hear the turbo wind alot cleaner!!!!
__________________ 2002 Pewter Chevy Silverado 2500HD LB7, CC, LB, 4x4, T-keys turned for extra lift to clear BF Goodrich 305/70/16 [/COLOR] 15% tint all around, no muffler or cat, 6" tip, Cobra radar detector Bully Dog Power Pup, Edge Juice W/ Attitude, PPE Boost Valve, AFE Intake, Left Coast Diesel Dyno'd @ 424hp Stock Deck crossovered to Arc 2400 watt Amp runnin 12" Kicker CVT Subs
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