Dorch Engineering B58 Gen 1 Lift Kit - Exhaust Camshaft +40%

After years of setting records with their S55 and N55 "Lift Kit" camshaft products, Dorch Engineering brings the same proven approach to the Gen 1 B58, genuinely a game-changing product for this community. The upgrade consists of a billet OEM-spec exhaust camshaft with Dorch's custom high-lift fuel lobe. Because the camshaft profile itself remains OEM spec, there's no need for upgraded valve springs or any special tuning to run it.

Installed alongside your Dorch HPFP, this delivers 40% more fuelling capacity beyond the existing HPFP flow alone. The numbers speak for themselves: paired with Dorch's DS25-250 HPFP, flow potential jumps from 750whp to 1000whp on gasoline, and from 550whp to 770whp on E85, at the same 250 bar operating pressure. Genuine billet-machined construction, not a compromised regrind of the stock camshaft.

Important: Gen 1 B58 engines exist in two distinct camshaft versions depending on build date, designated "Gen1" and "Gen1.5," split around an August 2017 cutoff. Confirm which version your specific engine uses before ordering, fitting the wrong one won't work.

Once you approach the upper limits of a Stage 2 HPFP with this cam installed, the B58 fuel system becomes limited by the injectors. To see the true benefit of this upgrade, higher-flowing injectors are also required.

Why Choose This Exhaust Camshaft Lift Kit

• Genuine billet OEM-spec camshaft with custom high-lift fuel lobe, not a compromised regrind
• +40% more fuelling capacity when paired with a Dorch HPFP
• Flow potential up to 1000whp on gasoline, 770whp on E85 (with DS25-250 HPFP)
• OEM-spec profile means no upgraded valve springs or special tuning required
• Proven design philosophy carried over from Dorch's record-setting S55 and N55 Lift Kits

Compatibility

• BMW F20/F21 M140i (B58 Gen 1)
• BMW F22/F23 M240i (B58 Gen 1)
• BMW F30/F31 340i (B58 Gen 1)
• BMW F32/F33/F36 440i (B58 Gen 1)
• BMW G30/G31 (B58 Gen 1)

Critical fitment note: confirm whether your engine is the original "Gen1" or the later "Gen1.5" camshaft version (split around an 08/2017 build date) before ordering, these are not interchangeable.

Requires: an existing Dorch Engineering HPFP kit, this camshaft is not a standalone fueling solution.

Recommended pairing: higher-flowing injectors are needed to see the true benefit once approaching the upper limits of a Stage 2 HPFP with this cam installed.