BMW N57B30 Diesel Head Porting


Porting for stock or oversize valve BMW N57B30 head.
Includes work only, using customers head, valves and parts.
Oversize valves, guides, retainers, springs etc. can be supplied separately.
Price includes:
- Disassembly, cleaning and assembling
- Porting and flow measurements before / after
- Valve refacing
- Valve seat machining to head
- Re-surfacing
- New valve guides on exhaust side (Intake does not typically need replacing)
- New valve seals

Flow increase over stock head is ~20% with stock valves on Intake side and ~10% on exhaust side.
Exhaust to Intake flow ratio is high and runners are kept small and efficient for good swirl and burn efficiency.

Delivery time ~2-months.

Please be in touch with email before ordering to be sure this head fits your purposes.

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