B21a?

[Turbob20EG]

Thanks for help everyone...I got another honda books in mail today..I suggest everyone get few aftermarket books when building honda's...I have access to alldata but all it covers is factory but anywho back on topic..

This is what it says in "Honda Engine Swaps" by Aaron Bonk...Basicly B20 & B21 in '88-'91 Prelude have different bolt patterns on almost all of their componets, so the common B-series interchangeability in heads, trans, and internals is next to impossible. The B16A heads can be retorfitted onto these blocks, but it is not a bolt-on install. Takes machining and drilling.

That is summary what it says so yeah they are waste of time. The aftermarket is nearly non-existant. Only thing I have seen are turbo pistons...So unless you are wanting to be unique then common B-Series it is.

[dubcac]

^^^That's what I thought.