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I am looking for forged units. I can't see why they would have forged pistons in the older BPT engine but in this newer turbocharged engine put a cast piston. I am really looking for a BPT piston, but those are near impossible to get unless you have a contact in Japan who can order them. These...

I am trying to find out if the BP4W pistons from the 04-05 Mazdaspeed Miata are compatible with the standard BP-ZE found in most 323s, Protege's, Escorts and Miatas. Do they have the same 20mm wrist pins? same 83mm bore? Has anyone done this? I have searched this forum and could not find an...

Thanks alot. So in essence I could use the OEM Mazdaspeed Miata pistons in my 92 323 With BP-ZE swap, and it would be a direct cheap replacement for aftermarket turbo pistons? Im assuming the price from the dealer is something like $55-70/each which would be way less than any forged...

This is my first post on this site, so welcome me to your community. I have used the forum search and could not find anything that could answer my question. I am trying to find out if the BP4W in the 98-2000 Miata and 04-05 Mazdaspeed Miata pistons are compatible with the standard BP-ZE found...