- EVOLUTION 1984-UP
- HEAD DIA 1.615"
- OVERALL LENGTH 4.525"
- STEM DIA .5/16
- BLACK NITRIDE
- SINGLE GROOVE
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- Twin Cam / EVO / Sportster
- Exhaust Guide
- O.D. .5635" , I.D. . 308"
- Oversize .001"
- length 2.100"
- 5/16 Valve Application
- Suit High Lift High Flow Application
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