What would be the best engine swap for an e21? An engine that is light and powerful, not too complex and reliable. Seems like a no brainer then – the aluminum block 24v engines have the same cylinder spacing as the m20 (originally found in e21s) and weigh even less. They have a wide power range thanks to the VANOS system, run silky smooth and pack a punch.What we’ve seen on the market are very poorly engineered solutions to swap a 24 valver. That is why we developed this set of engine support arms that allow you to drop a modern power plant in a M10 subframed 3er.Our build used one of the largest and strongest transmissions you could want – the ZF out of e39 528.We supply two engine support arms and a transmission support beam.Our kit allows enough clearance to use your stock brake vacuum booster.The supports are laser cut and TIG welded, then powder coated in black. – The swap requires e30 non offset bushings.– Front sump from e34 is also required – it needs to be modified on its rear end to clear the subframe. Check out this gallery if you need to get a better idea of the engine position achieved with our kit.
