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KTM 65SX 2009 - 2025 Husqvarna TC65 2024 - 2025 / GasGas MC65 2024 -2025 Phathead cylinder head kit
KTM85 2025+ Phathead cylinder head kit GasGas MC85 Husqvarna TC85 supermini
Stock (91+ octane)
Y105 Big bore 52
Fits 2021 - 2024 GASGAS bikes
Cobra CX50 replacement combustion chambers - fits Phathead or Original head Chamber Selection:CX51 (100+ octane) KTM 65SX 2009 - 2025Our cobra CX50 inserts are made in house to fit our Billet high flow Phathead shell or the OE cast cylinder head shell. CX50 stock compression CX51 (100+ octane) CX52 (105+ octane)