NPP has always been an add on option for the Camaro since the 2013 MY and will continue as such for 2014. I believe it will be an available option for the LT as well as the SS. The pic above shows the vehicle without the NPP exhaust.
2015 CRT 1SS/1LE RS/Recaro's/NPP/Nav/Rear vision pkg./BA speaker upgrade.
ARH 1 7/8 headers, CAI, BMR 1.25 drop springs, JPSS Billet Bushings, Peddars Cradle Bushings, DSS driveshaft ...421 whp...so far.