Model HK4-1: Universal ProBlaster™ Complete Black Quad Air Horn Kit | 130 PSI New Open Box heavy-duty brass inline check valve

heavy-duty brass inline check valve to block tank backpressure from forcing residual airflow back into the compressor cylinder head

3/8" snorkel hose line

long-term performance under the most grueling conditions

2007-2018 Jeep Wrangler JK & JKU (2 & 4-Door)

Model HK4-1: Universal ProBlaster™ Complete Black Quad Air Horn Kit | 130 PSI New Open Box heavy-duty brass inline check valveModel HK4 1: Universal ProBlaster Black Compact Quad Air Horn System STOP BEING IGNORED. START BEING HEARD. The Model HK4 1 is engineered specifically for drivers who demand maximum sonic impact and a discrete, "blacked out" aesthetic. This system takes our best selling platform to the next level by utilizing a quad trumpet configuration to produce an even louder, richer, and more complex tone than standard setups. With four tuned trumpets, the HK4 1