are you sure you dont have the MAF sensor in backwards? you should have no issues and it definitely should not touch the other side of the intake lol.
As for the fluctuations in the rpms, this is jsut the ecu adapting to the new intake. make sure you disconnect the negative battery cable for a few minutes and reconnect it.
2 Sundown X10's in 2.5cuft Net tuned to 31.65hz
SKAR SK-1500.1d, SKAR SK-85.4
Lots of Audio Technix 0 gauge
XS Power 1200,XS Power XP3000
I murder lowssss