Got 3 questions help on any is much appreciated:

1. I got my '96 gxe stripped stock ($17,695 in 11/95 - pretty proud of since I'm not much of a dealer). I felt smart by getting a whistler alarm with remote entry for approx $175. The battery died every 3 months, and the remotes wore out in about 3 yrs. I finally cut the horn wire when it wouldn't shut up one day. My quesion is can I get a factory remote ie Nissan, or is this ridiculously expensive.

2. Getting WSP y-pipe, should I get their B-pipe fix $82.50-$85 with resonator (I think this is only part of b-pipe and requires welding to stock pipe?), or will local shop custom pipe do just as good/cheap? (plan to keep my stock muffler)

3. when I put in JWT Popcharger, I just left that sensor deal (temperature sensor??) hanging - is that a problem or do I need to make some kind of bracket -- sorry for mult ?'s