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20cc volume is the VHM standard for KTM 250SX / Husqvarna TC250 and is developed for the best overall performance
*Bolts x 2 are included*
Use in combination with VHM head AA33171 and VHM 12° piston APKT08521707
Original silencer does not fit with this exhaust
2-stroke pistons have an 18% silicon content which decreases wear and thermal expansion
Honda CR125R 1987-1999 VHM Cylinder head + Insert Kit AA33155 Make Year:1987-1991 20cc volume is the VHMMade in the Netherlands The world famous golden VHM head with exchangeable combustion chamber is specially developed for optimal power output during the whole race and has an improved water duct. It's manufactured from a high quality alloy and O rings are used for the sealing. 1x O ring is included, as well as 5 copper washers and 5 nut caps. Features: More engine power Better heat transference More resistance to detonation Exchangeable combustion