PhatheadRacing
KTM300SX 2023-25 Husqvarna 2025 300XC TC300 TBI Phathead cylinder head kit
Couldn't load pickup availability
KTM300SX 2023+ Phathead cylinder head kit
Chamber selection:
300SX - 23.5cc Stock compression
301SX - 23cc Mid compression 95+ octane reccomended
302SX - 22.5cc High compression 100+ octane reccomended
Phathead Kits include a head shell with one combustion chamber, two sets of o-rings, cylinder head nuts, copper washers, some stickers for your bike and tool box and installation instructions..
Phathead cylinder heads are made of 6061 T6 billet aluminum. The material is stronger and transfers heat better than cast aluminum. The two piece design allows an increase in coolant flow as well as surface area which improves cooling for better consistency and performance.



