Speakers and Exhaust additions

[GSRP]

I have a 1999 Boxster and wonder about making two changes:

1. Installing the GHL exhaust system
2. Adding rear speakers

Since I am a new owner, I don't know squat about doing either of these.

Can speakers even be added...gosh, where would you put them?

Has anyone had any experience with the GHL exhaust system? I wouldn't install it myself -- but wonder if the change in sound and/or performance is worth the money.

Thanks for your comments.

-gene