Toyota Supra

I was wondering how the older Supras (up to 1992) rated in terms of perfomance. The turborcharged ones- I believe- make around 235 hp, but are quite heavy.

Also, are there many aftermarket performance parts available?

oh yeah, signal has one up around 600+hp and i met a guy with a 91 with 565rwhp.
his turbo was huge

They're not really that heavy...are they? I thought they were only 3000 lbs.