get out a tape measure and find the diameter of the pipe...

 

dam man your a fuckin genious, i swear to god i never thought of just taking the bumper off then measuring it, i was too lazy to even think about it, also ive seen those K&N filters, are they ok to use on an AEM CAI, will the performance still be there and is the price worth it, think it was like $45-60 bucks at autozone...

 

k&N in my opinion is better than AEm...