I recently purchased 725cc fuel injectors and don't know what kind of fuel pump I should get. what would be the right fuel pump for my injectors? and will these injectors give me a lot more power?

 

Walbro 255? I'd imagine that would be more than adequate. Can't see injectors adding horsepower as bigger injectors are typically associated with boosted applications and the ECU is only going to allow as much fuel that is needed to maintain an optimum A/F ratio; pending throttle. If anything, you'll be running rich if I had to guess.

 

Well, how can I be getting more air in my engine? so my fuel injectors give more power? I have downpipes, Y-pipe, CAI, what else can I get? Will an upgraded throttle body do the job? if so what kind of throttle body would be good? and what do throttle body spacers do? sorry kinda of a noob at this stuff.

 

injectors nor pump add power.... they add fuel... if you're upgrading your injectors you might as well upgrade your pump. aeromotive 340would work fine... it is a drop in pump so not much to cut/break....

 

So you have headers, stock cats, aftermarket Y-pipe, then stock piping from Y pipe back? Am I reading that right? If you want to add more air in, you can get 63-65mm throttle bodies or 70mm EPS throttle bodies and would need a tune.