Question to thread owner:- How far in mod would you go? What's your target? Budget?
If it's still stock, best to start on handling and safety...
you'll drive faster and better, coz you're able to harness the current engine power...
then only start to upgrade the engine...
- Brake: front 2pot, coz auto uses a lot of braking
- Brace: Anti-Roll Bar (ARB), Fender Bar (i believe a MUST), etc...
it's the route I start with... and 4years to complete...
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the above is from 1 of my post in '20V Auto Mod' thread...
ok back to your question, something I did on my old auto...
- exhaust - 'Jian Hang' custom 4-2-1 extractor + 2.3" piping with 1 long bullet in middle + FGK S-flow muffler
- plug cable - best to invest for Nology (proven to increase hp) but NGK Power is good enough (don't confuse with the normal NGK cable)
- Air filter...
K&N drop-in + feed-in CAI to the original intake-box + ARC intake plenum + Trumpet in original intake plenum..
...i've added pics on the intake before this...