The largest fuel rails available that fit the stock Hellcat supercharger — supporting 2,000+ horsepower. While every other billet fuel rail on the market for the 6.2L supercharged HEMI tops out at -8AN, the ModalWorks Hellcat High Flow Billet Fuel Rails run a massive -10AN design — substantially more fuel volume and flow capacity for high-boost, high-horsepower, and E85 builds, with true OEM-style fitment on the factory supercharger.
Why -10AN beats -8AN
Fuel rail volume acts as a reservoir at the injectors. On big E85 combinations, undersized -8AN rails become the hidden restriction: fuel pressure drops across the rail at high injector duty cycles, leaning out the cylinders furthest from the feed. Our oversized rail bore and 0.365" injector feed diameter eliminate that restriction and even out fuel distribution across all eight injectors — enough flow capacity to support 2,000+ hp builds, headroom that -8AN rails from the big-name brands simply can't match.
Features
- Supports 2,000+ horsepower fuel delivery
- Massive -10AN high-flow design — the largest rails that retain stock Hellcat supercharger compatibility
- Precision CNC machined billet aluminum construction
- Oversized 0.365" injector feed diameter for improved fuel distribution
- Integrated 3/8" NPT port (NPT variants) for a fuel pressure damper, fuel pressure sensor, or return line
- Increased fuel volume and flow capacity over traditional -8AN rails
- Built for high-horsepower gasoline, E85, and flex-fuel applications
- OEM-style fitment — no supercharger modifications required
- Designed and machined in the USA by ModalWorks
Fitment
Fits the 6.2L supercharged HEMI (Hellcat) platform with the factory supercharger. Retains stock supercharger fitment — ideal for street cars, drag setups, and high-horsepower E85 combinations. Questions about your specific build or model year? Contact us before ordering.
Which option do I need?
- Standard Rails — -10AN high flow billet rails, no NPT fittings.
- NPT Rail — adds the integrated 3/8" NPT port for a fuel damper, pressure sensor, or return.
- NPT Rail + Fuel Damper — the complete setup: NPT rails with the fuel pressure damper included and ready to install. Best value if you're running E85 or big injectors.
FAQ
How much horsepower do these fuel rails support? The -10AN design flows enough fuel for 2,000+ hp builds — the highest-capacity rails available that still fit the factory Hellcat supercharger.
Are these the biggest fuel rails that fit the stock Hellcat supercharger? Yes. These -10AN rails are the largest available that retain factory supercharger compatibility; competing billet rails are -8AN.
Do they work with E85? Yes — billet aluminum construction is fully compatible with E85 and flex-fuel blends, and the added volume is exactly what large ethanol injector setups need.
Is a fuel damper included? Choose the NPT Rail + Fuel Damper option and it ships with the damper included. The standalone NPT Rail gives you the 3/8" NPT port to run your own damper, sensor, or return.
