I'm thinking of ordering various light bulbs. Just wondering what the difference between the Fog Light Halogen Replacement Bulbs and the Headlight Halogen Replacement Bulbs in 55 W and 100 W? What should I buy and what's the difference? And will the Racing Beat REVi Ram Air Duct works well together with the K&N Typhoon ver. 2 to get more cold air into my intake or is it just waste of money if it's not used together with the RB intake or the stock?