Dorch Engineering

We are proud to offer a game-changing product for the S55 community! With this innovative solution we are able to push +38% more fuel flow out of the OEM HPFPs! We start with Genuine BMW vacuum pump...

We are proud to offer the world’s first B58 HPFP upgrades! Our Stage 2 kit is a bigger, better version of our Stage 1 kit for some of the more extreme applications. This is a complete...

We are proud to offer the world’s first B58 HPFP upgrades! This is a complete plug-and-play kit to support up to 560whp on E10 fuel (this number can vary quite a bit depending on tuning...

Our Stage 2 kit is a bigger, better version of our Stage 1 kit for some of the more extreme applications. This is a complete plug-and-play kit to support 650whp and also allow for full E85 up to...

This is a complete plug-and-play kit to support up to 530whp on E10 fuel (this number can vary quite a bit depending on tuning strategy and the blend of ethanol). There’s no cutting, no...