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Duotone panel — violet briefing on the left, lime-sealed detail sheet on the right.
We replicated the Athena chamber to offer the best performance for your two stroke big bore kit
1cc Stock (91+ octane)
151SXefi (95+ octane)
Y20 - 22cc Stock compression for the X model
KTM150 TPI Phathead cylinder head kit GasGas Husqvarna 150 Transfer port injection
Suzuki RM250 Phathead cylinder head kit 2003-2009 Color:Matte black We replicated the Athena chamberSuzuki RM250 Phathead cylinder head kit 2003 2009 Chamber selection: Y21 21. 1cc StockY22 20. 1cc (95+ octane)Y23 19. 1cc (100+ octane) 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