Mega Boosta

From Lexicanum

Mega Boostas are Ork devices which attach to units of Mega Armour and generally increase the power available to the suit. This allows the Ork a better chance of getting to a fight quickly as the suit has the possibility of moving fast enough to keep up with the rest of the boyz. This can sometimes lead to sections of a unit of Mega Armoured Nobz moving more quickly than others, if only some of the Nobz have Mega Boostas.

Sources

• Warhammer 40,000: Wargear