Blue Magic NA31-12PK Turbo 108 Octane Boost - 32 fl. oz, (Pack of 12) Single Pack Octane Booster  Increases octane level and anti-knock effectiveness, and hesitation and stalling Restores lost horsepower safely for all gasoline engines, sensors and catalytic converters Turbo 108 is a Fuel Additive and Cleaner & a racing fuel concentrate for professional competition Eliminates engine knocks and hesitation / stalling while boosting fuel performance