I am purchasing the following bolt on mods for my 2003 6mt Z. I am wondering how many of them I should consider doing myself, I will also have my son help and he is a pretty good mechanic. I have ramps and access to just about any tool that might be required.

1. Crawford HF cats and Injen SES straight tip dual exhaust.

2. Crawford V5 plenum and Strut Bar.

3. Samco radiator hoses

4. UR Crank Pulley and belts

5. B&M Short Throw Shifter

I am also getting a Greddy oil cap and a KDP radiator plate/air guide.

Any comments or concerns are welcome.

Thanks,
Fritz