with you having a gtp... im gonna say the beat thing for the money is the u bend delete in the exhaust... for 40 bucks a exhaust shop will weld a straight pipe and make a bung for your o2 sensor. they said this will net you between 5-7 hp... and for fourty bucks that isnt bad. if you feel like spending a little more a downpipe would also be huge. and if your running close to as much as you want to spend... jusy go buy a cone filter and slap it on... i believe even open cone is better than that airbox. then you can reuse the cone when you get a complete intake system.
at least thats how i would go haha. best of luck! happy modding!
