For myself I own a 2015 Challenger R/T Plus, 5.7L HEMI with an 8 speed automatic transmission, which came stock with a 3.07 open differential, 20" x 8" rims all around and 245/45/R20 tires. All of my upgrades are posted in my sig which can be seen by all, if the proper box is checked in your profile, I will be glad to answer any questions

The R/T starts at $40,980 and gets the 370-hp 5.7-liter Hemi V8; step up to the R/T Scat Pak, and you’ll need to bring $48,400, including a $1000 gas guzzler tax or $54,435 for the widebody.

I copied this down in my notes; I got it from one of the other forums: "EZA" was the first 5.7L Hemi. "EZB" was the first 5.7L Hemi with MDS. "EZC" is the new 2nd gen 5.7L VVT without MDS. "EZD" is the new 2nd gen 5.7L VVT with MDS. "EZE" is the HEV 5.7 that was in the Durango/Aspen. The 5.7 L HEMI engine for 2005-2008 has slightly less horsepower than those found in the Dodge Ram or the Dodge Charger (330 vs 345) due to different engine control unit (ECU) programming. The 5.7 L HEMI engine for 2009 and up was upgraded with Variable Cam Timing (VCT) adding 27 hp (20 kW; 27 PS) and 14 lb⋅ft (19 N⋅m) of torque. The new starting point is the SXT, which begins at $27,990 including destination fee and brings you the V-6 and the eight-speed automatic. If you want a Hemi V-8, you’ll need to move up to the R
5.7 to 6.2 hemi upgrade. Greetings everyone. I have a 2015 Dodge Challenger R/T 5.7. I am considering swapping the engine out for a SRT 6.2 Hellcat motor. I know that the brakes would need swapping. What are other things that would need swapping or upgrading.
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dodge challenger 5.7 hemi v8 fiche technique