I honestly think that the best option for a stock Stinger is simply
snorkels and a drop in K&N filter. I dropped .1 seconds in the quarter mile and gained over 1 mph with that simple $250 change.
However, I have lost the ability to use launch control now with my RWD Stinger. The torque at launch was noticeably greater on a cool day. It was so much different that launch control was useless even on a prepped track.
Even without launch control and TC turned on it still was .1 seconds faster with just the
snorkels. It went slightly faster with the
Snorkels and the Drop in Filter without launch control.
With an AWD stock car I think the
snorkels and a drop in K&N would produce extremely noticeable differences in results for the quarter mile.