I’m looking to upgrade the sound on my Hellcat and really want that deep, aggressive muscle car growl without losing performance. I’ve been looking at Borla and Corsa, but I'm worried about highway drone during long cruises. For those who have swapped their stock setups, which cat-back system offers the best flow and loudest tone without being obnoxious inside the cabin?
For your situation, I'd honestly skip the high-priced kits and try the Mopar 77072381 Active Exhaust Delete Kit paired with a mid-muffler swap using DynoMax 24222 Race Bullet Mufflers. It hits that deep growl for under $200 total, which is a steal compared to the $2k Borla setups.
I went through this last year with my own Hellcat! Honestly, finding that balance between a raw, muscle car scream and highway sanity is a total science. To understand why drone happens, you have to look at the exhaust frequency—when the engine hits specific RPMs, the sound waves can actually resonate with the cabin structure, which is exactly what we want to avoid. Anyway, back to your question about the setup!
Just sharing my experience:
1. I eventually landed on the Borla ATAK Cat-Back Exhaust System 140640 after testing a buddy's setup. The sound is absolutely aggressive when you're pinned, but it stays remarkably quiet at 75 mph.
2. I also considered the Corsa Performance Xtreme Cat-Back Exhaust 14939 because their Reflective Sound Cancellation tech is legendary for killing drone.
3. Another technical gem I've loved is the AWE Tuning Touring Edition Exhaust for Dodge Challenger SRT Hellcat, which uses a 180 Technology resonator to cancel out those annoying frequencies!
Seriously, teh difference is night and day compared to stock. Hope this helps!
No way, I literally just dealt with this yesterday. Small world.