Here's my review of the FireStorm Booster on a BMW E39 M54 engine.

After using it for nearly 2 weeks, I can say this product really provide the throttle lightness that continental car owners are looking for. The car thumps forward at the slightest touch on the accelerator pedal. Throttle response is very good after installation. It's nicer to drive in traffic jams as the car feels lighter.

Engine starting in the morning - faster than before.

Noise level - reduced when engine is warm.

Step on the accelerator again after slowing down, you can feel the engine revs up more effortlessly than before. This is the thing that I like about this booster. Even acceleration at high speed (180-190 km/h) is there, and you can feel the surge of power even at these speeds.

Bought my 2nd unit from Peter and installed on my mate's E39 (same car) and it proves the feeling I am getting on my car. He felt the same too.

Thanks Peter and Chuah for your product and the passion to create more of these wonderful products for car owners. Thanks again!