Need Help Quick

**crzycowboy** · 04-05-2007, 12:20 PM

One of my distributors need some help, Will a 2004 front back kit fit on a LLY engine? Or did GM change the flange on that front pipe. If everything is the same, then our kit will work, if not, then we'll need to make up a new front pipe for the LLY engines....Please let me know guys! And thanks for all your help!!!

**TYREBOYZ_DEMAXIN** · 04-05-2007, 01:15 PM

this is a dumb question,but are you talking about the exhaust turbo down pipe?sorry for this question

**crzycowboy** · 04-05-2007, 01:21 PM

Yes, not the down pipe it self, but the front pipe under the truck....before the cat.

**ob_1jr** · 04-05-2007, 01:22 PM

IIRC they are the same. they changed it on the LBZ, that I know for sure since it is slip-pipe and not 4 bolt flange. I know a lb7 front pipe will fit on a LLY with no problems. Many people have deleted the cat in this way. So, this would mean that it would work.....downpipe (or turbo) back.

**TYREBOYZ_DEMAXIN** · 04-05-2007, 01:39 PM

i put a 5" single t/b on my 05 LLY but i wanted to try the duals 4" t/b exhaust so i took the 5" off and put it on my 06 LBZ and didn't have a lick of problems interchangeing between the two....

**05_LLY** · 04-05-2007, 03:10 PM

IIRC they will all interchange except 06+ but the only difference there is the flange after the cat!

**crzycowboy** · 04-05-2007, 03:29 PM

Thanks guys for all your help!!!! You guys rock. I just wanna make sure I give my distributor the right answers. I wanna make the customer and the distributor happy!!!!

**TurboBeagleBuggy** · 04-05-2007, 03:32 PM

in 06 they eliminated the four bolt flange, other than that they are all the same LB7, LLY, and LBZ.