Porting of BBM Performer RPM or 440 Source stealth heads.
Includes work only, using customers head, valves and parts.
Oversize valves, guides, titanium retainers etc. can be supplied separately.
Price includes porting, valve refacing, seat work, re-surfacing and cylinder head measurements.
Flow increase over stock head is ~10% .
Stock head supports ~530hp, ported head ~600hp. Peak HP rpm also increases with ~10%.
For stroker builds, or depending of RPM we will adjust cross section
area to meet requirements, or machine seats for bigger valves without
additional cost.
Every cylinder head is hand finished.
Delivery time ~2-months.
