U7135 and Revisions 9r19 and 9r20

[PlumCrazy1091]

Have a 2007 Charger Daytona with the U7135 Predator. I have 9r12 currently on the unit When I install either revision 9r19 or 9r20 I get an error message on the handheld indicating incompatable hardware when it reboots after loading the revision.

Any idea of what the problems is? Is 9r12 the last firmware that's compatible with my unit?

[Cruisin1966]

Stick with 9r12 for your 07. You'll see no benefit in upgrading

[hpe475]

I have a 09 SRT hennessey challenger with a [with I think a custom tune] I have a DS & it says on top; 9r17, do I upgrade? Thanks

[hpe475]

I received in may 09, dealer installed HPE475 package, would it be a custom tune? SS headers, 180 stat, freeflow cats, custom magnaflow exhaust. & suppoedly a custom tune. Thanks.