My stock 96 Cobra needs tires. Is there a brand and size that offers both great grip and handling? I'm currently running (almost bald) 255/45/17 Yokohama A 520's. Should I go with 275 tires? Also, would switching to different rims (size, type or whatever) improve performance? I also want greater HP, and I'm thinking a CAI, any recommendations on brands and other inexpensive additions? Thank you.