Proudly introducing the CAT C-16 Sound & Engine Pack. All sounds were professionally recorded from a Peterbilt 379 wrecker which has 8-inch straight pipes and an 800HP CAT C16 tuned engine running with a C18 cam! Features Full engine sound set professionally recorded from the engine, intakes and exhausts. Complete engine RPM spectrum recorded, producing a very detailed sound. 575, 600, 625, 800 and 1000HP engines. Will work with all default trucks and popular modded trucks Also includes custom systems as follows: Dynamic Volume Effects Dynamic Sound Effects Dynamic Acoustics Effects Multi-stage Jake Brake Compatible with 1.46