Originally Posted by 98civichx
a header will help out the low end a little bit and take away from the top. i cold air kills anything really it takes so long for the air to get to the intake manifold i would recommend the stock airbox with a k&n drop-in filter. a short ram will kill your low end and help in the top slightly. i have used a short ram and a cold air. i prefer my stock airbox with k&n to short or cai. i get the low end help from my header and the stock airbox. i also have a 2.25" exhaust and a ractive fireball style muffler. i can kill ex's all day long and my car is an hx. i shift now at 7500 with the aid of a p28. with the stock ecu i shifter at 7000 and had no power loss. just long ass gears though. its all in how fast you can shift compared to who your racing. him shifting at 5000 doesnt help hi at all while racing he isnt using all his powerband.
wish u was closer to indy, id line my EX up against ur HX, ill give u 4 cars even
anyways, i was under the assumption a header helps high end and kills low end. as for the stock air box, that is a matter of preference. i only changed mine out for the loud ass vtec crossover my car has for a single slammer.
anyways, there are many factors to consider. sounds to me like your friend is raping you bc he is a better driver then you personally. i rev the f*** out of mine and it still pulls all the way til about 200rpms before i shift. i really need to get off my ass and do a video of my car lol. and yes, if he is short shifting as much as 2k rpms and you cant beat him revving to redline then you or your car has issues.