So my truck is an E99 w/ 112,500 on the odo. I'm gonna start beefin it up one piece at a time. I need to replace the air filter but thinkin it might be a good time to go aftermarket now. The exhaust is bone stock Cat and everything. I wouldn't create too high of EGT's changin out the air first and leavin exhaust stock until I can afford to upgrade would I. Or should I spend my money on the exhaust first and leave air stock for now. I know it sounds stupid but this is the crud that I think about. Oh yeah and guages will def be goin on soon too.