Mouth piece mod?

[RC4U12]

Has anybody done this mod?? or does anybody here have a LBZ mouthpiece for sale?? if so send me price...i want to do this...and the guy has what seems very good upgrades for up-pipes and down ect.....Jeff

forgot the link here it is http://www.dieselplace.com/forum/showthread.php?t=330203

[il_DURAMAX]

had one on my LLY, I did it at the same time as my full exhaust including the MP off the turbo on the exhaust side... So Im not sure how much of a noticable differance it would be.

All I know is it made a huge differance when i did it all.