An afterburner works by dumping hyperspace fuel into your engines and igniting it, producing a large amount of thrust. This can be very useful for dodging missiles or briefly escaping from faster opponents, but you must be careful to avoid using up so much fuel that you do not have enough left for hyperspace travel.
-Outfitter DescriptionTemplate:Endless Sky - Afterburner
The Afterburner burns fuel to give you a speed boost. Environmental affect is still under scrutiny.
The Afterburner can be purchased at the following ports: