KDSS does take away the sub tank, leaving the 93L main tank. Around town you get around 600km. More for highway. This is for drag racing at traffic lights, smoking nearly every car next to you!! I must say the 200 suspension, drive train, NVH are vastly superior to the LC100. Not as hard, harsh nor noisy. Pulling a trailer full of furniture was a breeze. No extra noises from the components. You can upgrade the suspension shock absorbers and coils, while leaving the KDSS intact.