im goin to do a little work for a buddy of mine...needs front rotors and pads changed and a plug job (i think)..so first question is when to change the plugs? i dont know how long the originals r good for? and brakes look straight forward...any probs i may run into? and any special tools? ie pushing the piston back in? the car is a 07 dx 5 speed 2 door..100% bone stock with near 60000 km's..and you should have seen the air filter...it was completely black with grease or something. hes not much for regular maintenance other than oil changes lol.