[Burger Steak & Eggs]

Yours is an 06. I haven't seen the fender snorkel from the older ones, but I am guessing they are smaller. In other words the HC filter removal and K&N swap may be the bulk of the gain for this mod on the later Gen 1s.

One of the guys I work with did this to his 06 bus in stages and although he was satisfied with the final performance improvement, he felt the hose addition itself did not provide the bulk of the added air flow because the 06 has a large duct between the passenger's fender and the bottom of the airbox. It certainly won't hurt to add the hose though. If you want a rough idea how two 1" hose compares to a single larger hose for potential air flow, how about comparing total cross sectional areas of the hoses?