Either way you go, make sure you go outside the engine compartment or you have a HAI (Hot Air Intake) after 3 or 4 minutes of engine startup. I see so many intakes inside the engine compartment and it just isn't a CAI. Dual looks better but for the N/A the single is plenty of air whether you have a tune, 74mm TB, or not. Happy modding everyone and remember the reason the "C" is in front of the "AI" in CAI.