Based upon Hartge’s original H23 exhaust manifold, our E21 M20 manifold set is constructed in T304 stainless steel and benefits from improved collector design. The result being a 7% improvement in flow when compared to the H23 manifold and a24% increase in flow when compared to BMW’s factory effort. Our manifold set is designed to cope with 3.1 litres of displacement, revving at 8000 rpm – so is suitable for whatever displacement and specification of M20 you choose to fit to your E21.
01823 674459 Email
Unit 1, Lobsgrove Park, Greenham, Wellington TA21 0LY