Demon
Supercharger

The 2018 Dodge Demon and the 2023 Demon 170 both run the IHI twin-screw 2.7L supercharger — the same 2.7L platform used on the SRT Hellcat Redeye High-Output, Super Stock, and RAM 1500 TRX. The 2.7L is physically larger than the 2.4L that powers the standard Hellcat, so it moves more air at the same rotor speed. The Demon made 840 hp stock; the Demon 170 made 1,025 hp on E85.

Both run the same IHI 2.7L twin-screw architecture. FAS Motorsports rebuilds the IHI 2.7L across all three generations it appears in — the 2018 Demon, the Redeye High-Output, and the 2023 Demon 170 — using the same disassembly, clearance-check, and flow-bench process for each.

The 2.4 and 2.7 refer to displacement — how much air the rotor pack moves per revolution. The 2.7L IHI is physically larger and moves more air at the same rotor speed, which is why it’s the factory choice on the higher-output cars. A properly ported stock 2.4L on a dialed tune typically supports 800–850 wheel horsepower; a ported 2.7L has meaningfully more room above that, which is exactly why it lives on the Redeye, Demon, and TRX. The 2.7L is the platform for builds chasing 1,000+ WHP on the factory blower. These are general ranges — actual results depend on fuel, tune, pulley combination, supporting mods, and conditions.

Rebuild indicators: bearing noise (whine or grinding at idle or under boost), boost creep or pressure loss without tune changes, rotor-to-housing contact (metallic sounds under boost), or any blower that has had coolant or oil contamination. On high-power builds running aggressive pulley ratios, proactive rebuilds at 40,000–60,000 miles are common practice. The IHI bearings, seals, and rotors run harder than the standard Hellcat unit, especially on modified builds.

FAS doesn’t list a standalone new 2.7L IHI supercharger for sale. The two paths customers use are the 2.7L IHI rebuild service — ship in your factory unit and get it disassembled, inspected, rebuilt, and flow-bench verified — and the Dominator 2.7L race-porting package, which pairs a ported rotor pack with a billet snout to extract airflow the factory casting restricts. Call FAS to talk through which path fits a stock Demon, a swap, or a core exchange.

Full disassembly, inspection, rotor pack cleaning and clearance check, bearing replacement, seal replacement, discharge and inlet port cleanup, housing inspection for wear or scoring, reassembly, and flow-bench verification before ship-back. It’s a ship-in service — pull the supercharger, ship it to FAS at 6161 Riverside Dr, Punta Gorda, FL 33982, and it comes back rebuilt in 3–5 business days.