Performance 1.8L engine parts

#1
Hi folks

I'm new to this forum and would like to say happy to be in the circle.
I got only one question for now, maybe two or three..
I have a1997 Toyota corolla DX and I'm thinking about rebuilding the engine. I been looking around and can't seem to find many internal performance parts.. Pistons, valve train, crankshaft etc. Is there a web site that has it all or a couple sites that have a few? Also, can I bore over on this engine and fine over sized pistons? Just looking for some where to start.

Any info will be greatly appreciated
Thanks
 
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