Why?

Because the majority of people who have it fitted do not use their cars for competition use. When I build a competition car I will go to every length possible to make the car a class leader and that includes ALS if it helps.

If its a road car then ALS can only be to impress chav's and girlies, so I frown on applications like this!! It shortens turbo and engine life, especially the thermal fatigue on exhaust valves and causes cvh engines to lose exhaust valve heads on a regular basis. On a competition engine where the engine only needs to run for a few hours between rebuilds this is acceptable but for a road cvh engine it is disaster waiting to happen!!!!