Outfront Motorsports CNC Ported 975 Racer B25 Cylinder Head Package Engine These are heat treated to

These are heat treated to a hardness of 26-32 HRC and then cyro treated for improved physical properties

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we have less valve distortion at the face than any of the tested designs

4 Temperature Inputs (Configurable pull-ups on ANT1&2)

Outfront Motorsports CNC Ported 975 Racer B25 Cylinder Head Package Engine These are heat treated toThe Outfront Motorsports 975 CNC Ported Cylinder Heads are the perfect performance head upgrade for competition and racing. These heads are a great option for the racer with engines up to 975 BHP. These are a great option for drag racing, time attack, hill climb or other competitive racing. The Outfront 975 Heads start with new OEM Genuine Subaru head castings. They are then CNC ported to have a big upgrade in flow. A multi angle valve job is