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Street Performer Head

Our entry-level performance head is for the customer who is looking for an increase in horsepower and torque while working with existing stock components. This head is compatible with the flat top 103 and new flat top 110 piston kits from Harley-Davidson but is recommended for use with the T-Man Performance 107 kits. This head will accept up to a 625 Lift Cam and Top Dead Center (TDC)  Lifts of 215 on the Intake / 204 on the Exhaust. Valve depth can be modified to accept larger TDC lifts upon customer request. Compression ratios will vary due to piston type. 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.

$ 950.00
Please contact us to order.

Head Details


Twin Cam Street Performer Head (Available in Air Cooled or, Water Cooled)

This head features our new port design with a fully CNC ported intake and exhaust ports that provides the most efficient flow rates. This head features 1.900 intake valve and a 1.610 exhaust valve. Our chambers are also CNC ported to provide consistency between each head. It features a 1.710 inlet opening (available in different sizes upon request).

Due to core shift in some Harley heads there may be areas where the CNC machine does not touch.

Click the Head Details tab for a complete description of parts and labor. For more details on the best fit for your riding style – call T-Man Performance.

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 1.900″ 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
Available Inlet Sizes 1.710″ 1.760″

*These heads are set up to clear a cam TDC of Intake 215 and Exhaust 204 valve to valve clearance. They can be modified on request.