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CLICK HERE to customize your own Yamaha
DYNO JET POWER COMMANDER APPROVED TUNING CENTER 
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- Manufactured from A356 T-6 aluminum
- Feature 2” intake valves, 1.625” exhaust valves and 1.80” intake ports
- Spring travel and valve clearance for cams up to .640” lift
- Heads come assembled; include a flange-style intake manifold and top end gasket kit
- Accept stock rocker boxes and rocker arm supports
- Sold in pairs
- Made in the U.S.A.
NOTE: Not for fuel-injected models.
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