Head packages require your heads to be sent to T-Man Performance for work to be completed. T-Man heads are specifically designed for your performance needs with proven results. T-Man offers several head configurations from the Street Performer to our Signature Thumper Series. There are optional upgrades available for most heads. They are noted on each cylinder head order form.
|VALVE SIZES||1.900"||1.610"||-0.003 / 88cc|
|VALVE SPRING INSTALLED HEIGHT||1.860"||1.860"||-0.020 / 85cc|
|VALVE SPRING SEAT PRESSURE||178 lbs||178 lbs|
|VALVE SPRING PRESSURE @ .600" LIFT||360 lbs||360 lbs||-0.040 / 82cc|
|VALVE SPRING TRAVEL||.770"||.770"|
|VALVE SEAL/TOP RETAINER CLEARANCE||.835"||.835"||-0.060 / 79cc|