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Subaru Chambering

CNC Ported Heads

Precision CNC Machine Subaru EJ20 Cylinder Head Combustion Chambers to EJ25 specs for installation on an EJ25 Short Block Assembly, commonly called a ' Hybrid Build '.

This is the factory EJ20 cylinder head combustion chamber before cnc machining:

This is the chamber after cnc machining:

Precision CNC machining on our Rottler P69AHD 5 axis cnc machining center:

Service Includes:
Precision CNC Porting Customer Supplied Cylinder Head.
Cylinder head inspection
Precision CNC machining pair of EJ20 Cylinder Head Combustion Chambers

* This service does NOT include Head Casting, Disassembly or Assembly, Precision Multi-Angle Valve Job, or Resurfacing. This is for the Porting Service Only. All other machine work is extra charge.

* Please note, It's not uncommon to see certain parts of the ports that are not machined. This is because with most of our port designs we try to keep port velocity to a maximum, It's not always about how big the port is, or maximum flow numbers. This almost always helps with low to midrange HP and Torque numbers without sacrificing top end. Contact Info
Airport Business Park
175 Leonard Drive, Groton, CT 06340