Version 2.1 Changelog: Supported BSA Freightliner Classic XL Version 2.0 Changelog: Updated for 1.42/1.43 Rebuilded sound 3 stages jake brake included (Note: sound from SCS Kenworth T680) Supported more trucks Better engine data Feature: CAT C15 6NZ 435, 500, 550, 595, 625 engines with straight pipe sound (625hp engine also replaced on SCS pete389 and kenworth w900) Smooth & Realistic engine & exhaust sound Custom sound attenuation for more realistic sound fades off