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Pro Street Head

T-Man Performance designed this head for the maximum effort 80 cubic inch EVO builder. This head will require a high compression piston. Larger valves are available for larger displacement motors. Check the specifications table for details on compatibility with your existing components. For more details on the best fit for your build – call T-Man Performance.

NC State Sales Tax will be applied.

Please contact us to order.

Due to age, paint may flake off during the cleaning process. T-Man Performance is not responsible for paint flaking.

Head Details


EVO Pro Street Head

This is the next step up in the line of T-Man Performance EVO heads. This head comes with a custom 1.940 intake and 1.610 exhaust valve. It is offered in a 1.710 inlet opening or, 1.800 inlet opening. The head comes with fully CNC ported intake and exhaust ports and fully machined chamber to control consistency from head to head. All machined areas are hand finished to insure max flow and port velocity. This head will require a high compression piston for an 80” motor.

Head packages require your heads to be sent to T-Man Performance for work to be completed.
* When not using T-Man Performance pistons the builder is responsible for checking all valve to piston clearances. 

Intake Exhaust Chamber Size
Valve Sizes 1.940″ 1.610″ -.003 / 91cc
Valve Spring Installed Height 1.860″ 1.860″ -.020 / 88cc
Valve Spring Seat Pressure 178lbs 178lbs
Valve Spring Pressure @.600″ Lift 360lbs 360lbs -.040 / 85cc
Valve Spring Travel .770″ .770″
Valve Seal/Top Retainer Clearance .835″ .835″ -.060 / 82cc
Inlet Sizes
Compression Release Options Manual