The engine that started all of this. Cheap to buy, expensive to ignore, and still capable of embarrassing newer cars when it's sorted. We've been inside enough N54s to know what's about to fail before you tell us the symptom.
Stock replacements, hybrids, or a single turbo conversion. Wastegate rattle, oil lines and coolant lines while we're there.
Injectors, HPFP, LPFP upgrades, port injection, flex fuel. Index 12 injectors if you want the headache gone.
Head work, forged pistons and rods, walnut blasting, the whole thing. We'll tell you when a rebuild makes sense and when it doesn't.
MHD custom maps for your hardware and your fuel.
OFHG, valve cover, VANOS, charge pipes, electric water pump, footwell module. Yes, that one.
| Engine | 3.0 L twin-turbo inline six, open deck |
|---|---|
| Chassis | E90/E92/E93 335i · E82/E88 135i · E82 1M · E89 Z4 35i · E60 535i · E71 X6 35i |
| Common asks | Turbos, injectors, HPFP, walnut blast, port injection, single turbo |
| Tuning | MHD · custom maps |
Send what the car is, what it's doing, and what you want out of it. We'll come back with questions, not a price. Once we know what we're looking at, you get a real quote, and it doesn't move unless the car surprises us. Then you get photos while it's apart.
We'll ask the annoying questions, then give you a real number.