The larger-displacement performance HEMI behind the SRT8 Challenger and Charger — built on the same well-proven architecture as the 5.7L, with similar minor quirks and a genuinely strong track record of its own.
This engine shares its fundamental architecture and most of its reliability traits with the smaller 5.7L HEMI covered elsewhere on this site — exhaust manifold bolts and MDS lifter tick on cylinder-deactivation-equipped examples remain the main recurring complaints. The larger displacement and higher state of tune haven't introduced new chronic issues of their own; if anything, the performance-focused ownership base tends to maintain these cars more attentively than average.
Not a guarantee, but a pattern seen consistently across owner forums and independent-garage reporting.
Exhaust manifold bolt issues most commonly surface within this range, consistent with the related 5.7L.
MDS lifter tick, where it occurs, tends to become more noticeable on affected examples.
Core bottom-end mechanicals are routinely still original and sound on documented, well-maintained examples.
Listen for a ticking exhaust leak noise, especially under load, the same manifold bolt check as on the related 5.7L HEMI.
Ask directly whether the car has been modified or tuned, and get any supporting documentation.
Ask about track use specifically, and inspect brakes, tyres and fluids accordingly if the car has seen regular track days.
Model-specific pages, with notes on how it behaves in that particular car.