Unleash your beast with Khrome Werks performance Insert for 4" HP-Plus mufflers.  HP-Plus baffles emit a deep, mellow exhaust tone that is adjustable by simply changing an insert held into the baffle by two bolts.​

• Gives you control over your "Growl Level"
• Produces deep, rich tones with the perfect balance of performance and sound
• Change sound levels in minutes, not hours.
• Specially designed for easy installation with basic hand tools (no hammers!)