HOLD ITmake sure the b20a your getting is from another prelude and ONLY a prelude if its a b20 from a crv, NOTHING WILL FITthe prelude b20 is the blacksheep of honda motors and no parts from other b-series motors will fit.and only parts from prelude b20 motors will fitbut if have the same motor. it will slide right inuse your old motor for donor parts to save some cashhope this keeps your from needless work