Use the SEARCH Button!!lol. Seriously though, for suspension, depends on what your looking to do with the car. If its just going to be your daily driver, if your going to track it whether its auto-X or just straight track like NASA. You would want a stiffer spring if that was the case. I have skunk2 racing lowering springs. They are ok but in my honest opinion, i wish i wouldnt have gone the srping route.
Springs are good for dd imo but when you want that multiple use type spring that can be used for dd and be set up for racing as well, coilovers are your answer.
As far as intakes, several options include cold air, short ram and others. Cold air in general when entering the engine burns better because the molecules are closer together, so if your in a climate with colder weather go with a cold air intake. CAI is set lower towards the ground sucking in the colder air. SRI is set in the engine bay where the air is warm. usually you would go with short ram as both CAI an SRI produce similar amount of power so you can go either way, whatever floats your boat. I have a few links for you to look at.
-Info on the difference between CAI verse SRI.
http://blogs.superstreetonline.com/...intake-cai-vs-short-ram-intake-sri/index.html
Intake manufacturers-
http://www.injen.com/docs/typeofvehicle/landing.asp?cc=sc
http://www.aemintakes.com/default.htm
-Links to mazda P5 specific stores/shops...
http://*************.com (If link doesnt show,google crossover auto)
[url]http://www.corksport.com/
http://www.protegegarage.com/
Hope these help, have fun with your new addiction. If you would like more advice, check out my corner of the web.
www.azmazdaclub.com