See: SWORKz 

SWORKz have introduced the LPF “low profile” cooling head for the S-Power S7 EVO II series, OS Speed Spec II/III and B2102 engines. The height of the heatsink is 24mm lower and the weight 10g lighter than the standard version. The LPF cooling head provides better balance especially during jumps and in high speed corners and make the car more stable. Despite his height, the cooling head thanks to a large diameter heat sink keeps the engine at a stable temperature.