The manifold will fit e28, e12, e21, e30 and e34 bodies. Even in the e30 you’ll get plenty of space for a big snail and downpipe. It features a divided external wastegate flange to which we provide a weld-on metal plate or an additional 90 degree adapter, the gate opening is 48mm in diameter and allows bigger WG for lower boost pressures if needed. Youtube review: https://www.youtube.com/watch?v=kbJkrZmRblw Abstract: While the M20 variants may feel a bit underpowered in the e28 body, it is indeed a smooth running engine with great potential, especially if you’ve got a bigger displacement and low compression ratio one with the right cylinder head. No matter of the displacement though, 300 crank horse power will be in easy reach, and much more if needed. Our manifolds have been proven in hundreds of projects around the globe to be a reliable way to boost your old school love or racing body with minimum hassle. Claim yours today! Please note that warranty claims for cracked manifolds will not be honoured with the lack of a flexible coupling on your downpipe. Using a turbo support/brace is advised on heavy turbochargers like the Holsett Hx35/Hx40.