Porting for stock or oversize valve Audi S2 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 ~25% on exhaust side.
Exhaust to Intake flow ratio is high and runners are kept small and
efficient for good thumble, burn efficiency and improved VE%. Delivery time ~2-months.
