Does any one know a good m20 rebuild kit?

[PROLAZCO]

I have a 1990 325i convertible and i am looking for a solid engine rebuild kit. Does any one know of any? Or does anyone have any recommendations for individual parts i should use? im not looking for super high performance. Just better than stock! PLEASE!

[jlevie]

To the best of my knowledge there is no such thing as an M20B25 "rebuild kit". Main bearings are chosen to match the crank journal dimensions. Standard rod bearing are used if the journals are in spec and otherwise a grind and oversize bearings are needed. OE piston rings are as good as it gets if the cylinder bore measurements show the bores to be within tolerance and the piston ring grooves aren't worn. Otherwise new pistons and/or a re-bore and oversize pistons are needed. Pistons, if needed are the only parts where you can make an improvement ove the OE parts.