i installed the rouckouts (which are similar to rocker locker) and they def quieted things down considerably. there still is a tiny bit of valvetrain noise but it's an engine. i'd say the valvetrain noise was reduced an easy 80% and to me was definitely worth it. you mileage may vary.
2012 FLTRX - stage 1.5 headwork, dragos 580 cams, 10.25 comp, FM stage 1 intake, dragula 2, TTS, 13" windvest, 14" evil apes, JRI 12" shocks, progressive monotubes, hertz and alpine, hawg wired amp, custom LED gauges, custom dynamics LED signals, lots o' powder coat
San Diego, CA