I have a 4-cylinder that I'm overboring for the pistons used in the 3.5L engine (92mm). With an M3 crank and some mods, it'll net my 320i with 2.2L! What I'm searching for is 4 pistons, but will buy your set, however complete/incomplete it is. Please let me know what year 735i they are coming from, so I can calculate the CR. Please email response, since I don't frequent the e23 board! Thanks, Josh