Help: Emissions in NYC

Hi Stangers:

I've got a 91 LX 5.0 AOD with a couple minor bolt ons (pullies, K&N
filter, Flowmaster 2 Ch, 3:73's and a performance valve body).

Does anyone know if I put LONG TUBE headers on with a high-flow (2) cat
h-pipe, will the car pass emissions? I want to get rid of the 2000 RPM
stock header drone and maybe pick up a few horses.

My car won't have to pass the coming NYVIP/OBDII test (it's older than
1996) but has anyone done this exhaust swap and passed the current
sniffer test?

TIA!

Sam