I've heard that the 2nd Gen Honda Prelude Si has the same engine as the 4cyl 90-93 Accord. If this is correct, does anyone know if headers and other engine components labeled as available for this model Accord work on the 86 Prelude?

 

I believe the 3nd gen accord (86-89) shares a lot with the 2nd gen prelude. 4th gen accord (90 - 93) shares almost nothing with it.

 

Yea the 2nd gen Lude had the same engine as the 86-87 Accord LX-i. They shared some other parts too (interchangable, not identical), like ECU, tranny, front upper A-arms, and a few other things too. 4th gens are totally different though...I don't think anything would interchange.