I found that: as much as I liked the Features and Ability of the Shaker 500 the age of it and reparability and recommendation, I found it easier and better to just Replace the unit. That was probably Over Wordy, but you get my point right? After years of play, you will start to notice the declining performance. And no, no one makes an equivalent replacement. I switched the unit and the stock Amps.
07 GT. SCT: CUSTOM TUNE by "MUSTANG SPECIALTIES". LMR: GEN2 2010 STYLE HEADLIGHTS, RAXIOM: 2010 SMOKED COYOTE TAIL LIGHTS, WHEELS: STAGGERED WHL 22X8.5F-22X10R MORE LISTED INSIDE.