Just increased the airline size to my Conrail S3L PVC train horn from 3/8" to 5/8". Definitely made it louder. Have a listen.







The only thing in the oil field that's for sure, is nothing is for sure.......

2017 Ram Laramie Longhorn 2500, Lifted, deleted, MM3 tuned by Double R Diesel. RevMax Enhanced 68RFE