KTM65SX 2009 - 2025 Husqvarna TC65 2024 - 2025 / GasGas MC65 2024 -2025 Phathead cylinder head kit Chamber selection:SX67 5.8cc 105+ octane Our cobra CX50 inserts are

Our cobra CX50 inserts are made in house to fit our Billet high flow Phathead shell or the OE cast cylinder head shell

1cc (100+ octane)

KTM 65SX 2009 - 2025  Husqvarna TC65 2024 - 2025 / GasGas MC65 2024 -2025 Phathead cylinder head kit

KX85 & KX100 up to 2013 (see other cap for 2014+)

OE cylinder 144cc 58mm

KTM65SX 2009 - 2025 Husqvarna TC65 2024 - 2025 / GasGas MC65 2024 -2025 Phathead cylinder head kit Chamber selection:SX67 5.8cc 105+ octane Our cobra CX50 inserts areThis head kit uses the 2024 2025 style plug with longer reach for an upgrade to the 2009 2023 models. Use the NGK MR8BI or OE 2024+ spark plug KTM 65SX 2009 2025 Husqvarna TC65 2024 2025 GasGas MC65 2024 2025 Phathead cylinder head kit Chamber selection: SX65 6. 2cc stock compression SX66 6. 0cc 100+ octane SX67 5. 8cc 105+ octane Phathead Kits include a head shell with one combustion chamber, two sets of o rings, cylinder head nuts, copper washers,