'05 FLSTCI has v@h 2 into 2 pipes. I have heard of intake modifications that use original cover. How do I tell if the air cleaner has been modified to match exhaust? Haven't been able to ride yet due to weather so don't know much except it sounds awesome in the garage (with door open of course). Wondering if pipes alone will improve performance or does the intake have to be changed to keep things right. Hope this isn't too vague. My first HD so I'm sort of stumbling right now.