Nothing else required on the exhaust, you're all set,
emissions wont be effected, that's a huge benefit to JBA's over LT's
Still have a stock intake? Better open that up for better flow too, goes hand in hand with exhaust and tuner to complete the "Big 3"
You'll want at the very minimum, a drop in K&N replacement flat filter
perhaps mod an extra inlet hose to the bottom of the stock box.
Other CAI options for a little more money:
aFe, Mopar, K&N,Airaid, Volant and Vararam.
I've used 3 different setups on my Ram before finally settling on the Volant. 3 good reasons:
100% sealed system with a lid , wont allow hot engine air in
Excellent high flow Dry filter good for 100k miles, never needs cleaning/oiling
Optional port in the bottom for a Ram Air tube.
CAI (Cold Air Intake) thread in the performance section: