Intake Tube on a Duramax

[TDI's RULE]

Does anybody know if someone makes an aftermarket air tube that goes from the stock air box to the intake horn? I am looking for a single piece that is smoother then the oem tube.
Thanks for any info.

 

[Jim 5]

The LBZ intake tube is supposed to be significantly better. You can find them in 06 and 07 classics.