Has anyone installed cold air intake on TLS? How is CAI vs. just swapping out stock filter with K&N high flow filter? I'm wondering if either one of these mods will improve performance since Honda engineers removed intake restriction on S type already. I guess it would be worth it to just have fun with the car and give the engine the "tuner" look... S type already has intake/exhaust improvments over the regular TL trim if I recall correctly from reading car and driver mag article.