Hello, First let me say that I really enjoy visiting your forum and learn so much information about my car, I really like people sharing information and helping you instead of telling you to sell your car and get a GST. I'm looking forward to install a new set of crower 2,springs and retainers. My question is; how can I get the most of it? How can I tune my car? do I need a SAFC or a MS and what times am I looking to get doing this. I already have in my car CAI, headers, no cat, borla exhaust and msd spark plug wires, Thank you.