I see exhuast kits for "cat-back" exhaust... I've looked all over my truck exhaust and see no cat from the manifolds back... Is this common for the LB7? Should i be looking somewhere else (like behind the turbo, or wherever)? It's a stock exhaust other than stuff i've done...

 

01lb7 had no cats on them

 

Maybe it's a Cali Truck

 

No cat bud. Thats a good thing about the LB7s! Just a huge muffler deal

 

Yep mine is an 03 LB7, no cat but huge muffler, all still factory

 

there is a flange in the middle of the factory exahust, the front pipe and back pipe are separate, the back pipe includes the muffler, the front pipe attaches to the up pipe, on the LB7 there is no cat, but the aftermarket exhaust would attach to the front pipe, replacing the stock muffler and back pipe.... its easy, just unbolt the factory back pipe, wrestle it out of the truck, and install the aftermarket kit, i would just get the "turbo back" exhaust

 

10-4... no wonder its soo freakin loud with the muffler delete pipe... it's throaty tho, i love the way it sounds... I've been looking into the 4" and 5" exhaust - what would be the benefits of both/either???

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Just FYI... I would recommend a muffler delete pipe at least for the noise it makes, if nothing else... Makes that diesel sound like a truck!

 

I like my 4 in straight piped exhaust. 5 inch kinda sounds like something is breaking imo.
http://s690.photobucket.com/albums/vv270/coorsbeer4/?action=view&current=100_0308.flv

 

I like the sound of the 3", but i'd like more flow, so maybe i'll look into the 4"