This isn't the most pristine H22A4; lifter tick is clearly audible. That being said, this is a brand new Apexi World Sport 2 exhaust with about 50 miles to break it in. It was very quiet to begin with but it's gradually gotten louder and deeper. It may continue to get a little louder but that isn't significant because of how quiet it actually is. I can only hear it at slow accelerating rpm, it levels off and after that I can only hear the engine. There is only a cold air intake tucked into the fender, but other than that it's a stock engine.
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