There are TWO guarantees given for the Torch Exhaust Flamethrower Kit:
1. With the proper components and proper setup, the Torch Brain Box will provide a solid spark to the spark plug(s) in the tailpipe(s).
2. With the proper setup needed for the ignition cut, raw fuel will go through the engine to the tailpipes.
However, the kit DOES NOT guarantee exhaust flames. This is mostly due to vehicles with restrictive exhaust. More information on this can be found in the Instruction Guide as well as the frequently asked question regarding catalytic converters and restrictive exhaust.