Slav Jerry DD13 Extra Variants by Qaaya

Adds 450 470 505 and 525hp variants of the DD13 Gen5 for Slav Jerry's Stock Detroit DD sounds for the Cascadia 2019, WS 49X and WS 57X. I have adjusted the torque curves to be exactly as the Gen5 is including the fact the 505hp variant torque drops off faster than the other variants. Requires Slav Jerry Stock Detroit DD sounds mod to work. Put this above that in the load order.