The Indian Challenger/Pursuit OEM fairing speaker enclosures are designed to fit OEM small magnet speakers. When upgrading audio to larger, and more powerful speakers, clearance becomes an issue. This is why we designed our 1/4" thick speaker spacer rings for 6.5" speakers. These spacers provide additional clearance for aftermarket speakers with larger magnets. Additionally, these speaker spacers minimize the modifications needed to the stock speaker enclosure.