It really isn't a "C" brake (Trade name Jake or Jacobs brake), A Compression Brake alters the valve timing causing the engine to make that Blubbering/Barking noise that most us oldtimers enjoy so much (Esp. with large straight pipes) those are the "Engine Brakes" they are targeting, not the E Brake users. I challenge some one in a car to actually tell if you are using the E-brake in a Dodge. I leave mine on all of the time and I travel through some of those Hoitey Toitey small villages with the million + dollar homes and slow children, no problem so far and not really expecting any. I use it when I need to idle the truck for a period of time on high idle, you can hear it work, sort of a 'potato in the pipe' sound.

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07.5 3500 Quad, SRW, 4X4, Laramie, Leathered, Dark Metallic Gray, 6.7, 68RFE, 20K Reese, Ride Rite's, 2 Viair air compressors, Bully steps, Kleinn Locomotive air horns (5 in all), Billet polished locking fuel door, 'A' pillar mount Auto Meter Pryo, PML X-deep trans pan
06 Durango 285 RL 5'er Lifted by KZ