The five speed Scooby box is the weak link. The 6 speed is another matter and will handle anything.
You can buy a mint mk2 Zs180 and have the belts done for the price of a good used 6 speed with dccd.
Some bits are dear, some less so but they are cheap to tune. Take a standard wrx decat + exhaust, panel filter and a remap and it will take it to 270bhp. Add a bigger turbo, injectors, intercooler and a remap and it will go to 350+
These bits are standard on the sti so are cheap for what you get. So you can add 130bhp for less than a grand, try that with a zed.
Planning on getting another zs as I still have a track day itch to scratch.
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