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Street Performer Kit

Our entry-level performance kit is for the customer who is looking for a substantial increase in horsepower and torque while working with existing stock components. We suggest utilizing one of the following T-Man cams for this kit: the 555 TQ, 580PS, 590PS2, or T-Man 625PS. Other Cams are available. Cam selection is based on your desired performance and riding style needs.

Available in 95”, 98”, 103” and 107”

Please NOTE:
At T-Man Performance, we pride ourselves on providing our customers with performance kits that are known world-wide as a leader in proven dependability. We strongly suggest our customers research a professional tuner in your area.

NC State Sales Tax will be applied.

$ 1,987.00
Please contact us to order.

KIT DETAILS

 

Description

Twin Cam: Street Performer Kit

This kit begins with our Street Performer heads, complete with CNC ported intake, exhaust ports and chamber to provide the most efficient flow rates, and consistency between heads.

The inlet opening is increased to 1.710 (available in different sizes on request for no additional charge) making this kit a perfect fit for a stock or slightly modified throttle body. This kit features our slightly oversized intake and exhaust valves and you have the option of adding manual or automatic compression releases upon request.

When using your stock cylinders you have two bore sizes to choose from:

  • The standard 95” which is a 3.875 bore or, increase the motor displacement with the larger 3.937 bore making it a 98”.
  • The 95” / 98” kit uses your existing 4” stroke flywheel assembly and no case modifications are required.
  • The standard 103” which is a 3.875 bore or, increase the motor displacement with the larger 3.937 bore making it a 107”.
  • The 103” / 107” kit uses your existing 4.375” stroke flywheel assembly and no case modifications are required.

Click the Kit 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.

Kit packages require your cylinders and heads 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.