In case anyone hasn't seen this, the new Injen CAI is available for pre-order from PTuning. Look under the Matrix rather than the Vibe. No affiliation, just thought this was big news.
I thought on my current GT Injen CAI they said it was dynoed to increase by 12.9 hp, if I recall correctly.
Justin 2003 Vibe GT - Mille Miglia Evo5 18x8 Wheels (now stock)- Magnaflow Cat-Back Exhaust (now stock)- Tein S-Tech Springs (now stock)- Injen CAI - Red Painted Calipers - Hella Supertone Horns - Polk Speakers - Bazooka RS8A-HP Sub - Kenwood Headunit - Still love my Vibe, but I've just turned it back into a basic daily driver.