General consensus is keep the airbox. The white jug is a silencer so it's optional for N/A. Not sure for the LGT.
Originally Posted by ConeEluder
I didn't believe it either, until I read this from MickeyD, a very respectable tuner:
"The silencer is a different issue. Taking out the silencer can cause MAF oscillations at 2500-2700 rpm in 5th gear under full boost. This is only an issue with small turbos such as the VF40 because large turbos can't build enough boost in this rpm range to make it a problem."
Now, given this is with a Stage II map - it still shows that the silencer DOES have an affect on the performance of the engine.
I'm throwing my silencer back in when I go Stage II today...