BMWB58 6 Cylinder Engine

The BMW B58 has rapidly become the platform of choice for serious 6-cylinder tuners — fitted to the M140i, M240i, M340i, X3 M40i, Z4 M40i and the A90 Toyota Supra. Stock, it makes 380–400bhp; built properly, the B58 is genuinely 1,000bhp+ capable. Pro-Race Engineering can supply the forged internals and head clamping that B58 builds need: forged H-beam connecting rods, CP turbo piston ring sets, ARP head stud kits and main hardware sized for the B58 block.

We expect this category to grow rapidly through the rest of 2026 as the UK B58 build scene matures. For early customers we offer full custom build-spec advice — call our engineers on 01621 473023. Lead times vary by item.