When installing damper housings, it is important to decide whether you want to take really good care of the engine or whether you want the most power. If you drive without an air filter, the engine will get dust from the air into the engine, or in the worst case, a small rock or similar will come. with into the engine and thereby destroy a valve, piston, or cylinder head. If you use the car for everyday driving, we recommend fitting an air filter so that it will exhaust anything that can damage the engine. You will find a universal air filter from eg Jenvey and a filter that fits on rare houses where there can be funnels inside the filter.