What exhaust does the Hellcat use?
When those 2017 models were introduced in the Hellcat and Scat Pack trimlines, they came loaded with a 2.75-inch dual mode exhaust system that let the Hemi engines howl when pushed, while still quieting down in more gentle driving situations. via
Is a Hellcat faster than a SRT?
These immensely powerful cars use the 6.2-liter Hemi V8 engine that produces 717 hp in the Hellcat and 808 hp in the SRT Demon, so the Demon is much faster than the Hellcat. The major difference between the two variants is the engine configuration and the supercharger that complements the power source. via