The GOTTS MOD removes the air filter from the whole scenario correct. That give more air so the engine breathes better? I am looking into tuner and exhaust the pulleys are pricey. Do they make a vast amount of difference? The e-fans are on my list.

 

No air filter is still there, you need that. It just allows more air flow than the restrictive stock tube.

 

Then I need to find a stock air intake to do it. Boooooo