[72/340]

I too think the 5.7 sounds better, more old school, the 6.4 sounds more European.

 

[72/340]

sport mode only allows the valves to open to 70%

and to answer ops question yes installing an active exhaust delete kit will give you the cold start sound at all times. however you dont need the delete kit for a 22 you can just wire/weld the active exhaust valves open and it does not throw any codes on the dash like the older model challengers do.

They stay open at 70% but are 100% open at WOT.