Mass Air Flow sensor...?
if it is, thats definitely something that needs to stay in the intake.
IIRC you can delete it, AND get away with a BOV by installing a Manifold Air Pressure sensor (MAS) instead of a MAF, but this seems like a lot of work for a sound?
Your stock recirc valves work MUCH better than any BOV, as they don't waste the charge air. A BPV will improve spool time in comparison to a BOV
Z32 TT
1996 Integra - winter beater with studs - RIP (deer)
2002 WRX - to be sold
2010 sti - winter