We have HP dyno numbers on the SL55 now, about 30 .
https://www.crossfireforum.org/forum...t=23346&page=2

CAI's:
I'm using the BDJ's twin tube intake. The factory air boxes are very restrictive in all area's of their design. This intake has been dyno'd to show an increase of 30 HP to the wheels over the stock setup.
The Needswing intake uses a single tube but places the filter in front of the radiator, directly behind the grill for optimal air intake. This intake also increase about 30 HP on the dyno.
The SL55 intake is a larger version of the SRT-6 intake and helps with airflow while still retaining some of the factory look.