RB26 Cylinder head - STAGE 1 - Boost Factory

RB26 Cylinder head - STAGE 1

  • $4,053.24

**Complete cylinder head, assembled and ready to bolt to a short block**

All cylinder head cores are stripped down to the bare bones, then jet washed, hot tanked in an aluminium safe chemically agitated/heated cleaning solution.  This process cleans all of the oil and coolant galleries of any residual material.  They are then machined and jet washed then rinsed again to ensure any and all metal removed during the machining process is removed.

In a STAGE 1 cylinder head we use entirely stock valvetrain that has been cleaned, inspected, and clearance checked.  We test every valve spring for tensile strength.  The head is well designed from the OEM and many of our builds have reached over 500whp on our dyno with this exact set-up.

Select a set of drop-in cams from the drop down menu if you are looking to make some more top-end power.  Stock RB26 cams reach peak power at about 6000RPM and begin to fall off after that.  Tomei TYPE B would help shift the power band higher, often reaching peak power in the 6600RPM range.  Any more aggressive cams would require valvetrain upgrades.


List of BASIC work performed;

-Cleaned, hot tanked


-Crack check

-Spring tension test

-Clean and polish combustion chambers

-Chamfered quench pads

-Valve Seat Machining (3 angle)

-Supertech Valve Guide installation & Diamond hone to size

-Supertech valve stem seal replacement

-Valve lash adjusted with shims available (may require additional shims)

-Complete aqua blasting, this process renders the head in better-than-new finish. 


The Stage 1 cylinder head is ideal for customers looking to rebuild their engine and have a completely refinished cylinder head with some basic upgrades.  All machining is performed by an extremely skilled RB26 engine machining specialist.  The assembly is completed by our full time Engine Builder who has completed hundreds of engine builds.