Hello dear elk driver fellows… Have a little bit of the original air filter box “reoptimized”….(very expert, I know 🙂 ) and found amazing intake sound. In another thread someone has already taken a look at the box and threw out the load suction valve and a few other parts that have not been named further. I have still gone here and drilled into the 2 air collectors to the left of the intake tube to the lowest point on the ground each a 20mm hole. Is for the performance on hot engine perhaps a little slowing*, but the passage and the ingenious, aggressive, but not too intrusive intake sound from below, it is worth it all times. (* it will probably only cause to the test bench to be able performance loss.) I don’t believe it myself, since the air collectors themselves sit very close to the engine and become very warm, also the accumulated air should take over the heat.