Well got in and installed the Jet MAF sensor upgrade. It claims to help your high flow filter upgrade(Rousch,K&N and Airaid) to help produce more hp(12hp upgrade according to Jet and another 12hp ugrade for the Rousch). I installed this after installing the Rousch filter upgrade I got from Bird and so far have noticed a difference during acceleration(which is what I figured it to do). Most these mods are noticable only during wot and accelerating. I guess the additional cost is worth it if it really helps the air filter upgrade to produce more hp and flow better and the exhaust does sound better for stock exhaust. It is a simple swap that only requires undoing the connector and two screws and replacing the stock unit with the new one and putting back the screws and reconnecting the connector(took me a whole 10 minutes to install). Everyone I talk to says if your going to change the air filter to a performance one than change the MAF sensor aswell. So this mod is done aswell as the air filter mod and now onto the next which I'm still thinking on.