Hellcat Supercharger on a 5.7L HEMI: Fitment, Adapter Kits, and What to Expect

The 5.7L HEMI is everywhere — in Challengers, Chargers, 1500 and 2500 Ram trucks, Durango SUVs, and Jeep Grand Cherokees. It’s a capable engine but it leaves serious power on the table from the factory. Running a hellcat 2.4L TVS supercharger on the 5.7 is a proven way to close that gap, and there are specific kits built exactly for this swap.

Here’s how it works, what fits, and what you should realistically expect.

Why the 5.7 HEMI Is a Good Candidate for the Hellcat Blower

The 5.7L HEMI shares a family relationship with the 6.2L — same block architecture, same bore spacing, compatible intake manifold pattern. That’s why adapter kits for the hellcat supercharger on the 5.7 exist: the blower’s bolt pattern isn’t a huge stretch from the 5.7’s intake layout.

The 5.7 also has solid bottom end reliability in stock form. On an otherwise stock engine, the 2.4L TVS at moderate boost (8–10 psi) is asking the rods and pistons to work harder than factory spec, but short of sustained track abuse, the 5.7 handles it for street driving.

Adapter Kits for the 5.7 HEMI

Running the hellcat blower on the 5.7L requires an adapter manifold or plate that bridges the 6.2L supercharger mounting pattern to the 5.7’s intake runners. Several specialty shops produce these.

What to look for in a 5.7 hellcat supercharger adapter:

• Billet construction — not cast aluminum. Under thermal cycling and boost pressure, a cast adapter will crack. Billet only.
• Port matching — the adapter should taper or match to the 5.7’s intake runner dimensions to avoid flow restriction.
• Integrated fuel rail provision — some kits include modified fuel rail standoffs to clear the supercharger housing.
• Throttle body relocation — depending on your vehicle, the throttle body may need to relocate to the front of the adapter.

Budget $1,200–$2,000 for a quality adapter kit designed specifically for the 5.7 HEMI. Generic plates cut for multiple applications often compromise fit on the 5.7 — avoid them.

Charge Cooling: Required, Not Optional

The hellcat supercharger uses an integrated water-to-air charge cooler. This system must be plumbed whether you’re running it on a 6.2L or a 5.7. You need:

• An intercooler pump (Bosch 0392 or equivalent, ~25 gal/min)
• A front-mount heat exchanger
• Coolant reservoir and lines routed to the supercharger inlet/outlet

In Challenger and Charger applications, there’s often room to tuck the heat exchanger in front of the A/C condenser. In trucks, routing is more involved.

Don’t skip this. Running the hellcat blower without its charge cooling system — even on a single pass — will spike inlet air temps to the point where knock destroys power and engine internals.

Power Expectations on the 5.7 HEMI

Honest numbers for the 5.7 HEMI with a hellcat 2.4L TVS:

| Configuration | Expected rwhp |

|—|—|

| Stock 5.7, 8 psi, pump gas tune | 450–500 rwhp |

| Stock 5.7, 10 psi, E85 | 530–580 rwhp |

| Built 5.7 (forged rods/pistons), 12 psi, E85 | 600–650 rwhp |

| Built 5.7, ported blower, 14 psi, E85 | 700+ rwhp |

The 5.7 starts at 375 hp stock. Adding the hellcat blower at moderate boost is a 100–150 rwhp gain that transforms the car’s street character. For serious power, a built bottom end with the ported hellcat 2.7L is the ceiling.

Fuel System Requirements

The factory 5.7 HEMI fuel system isn’t sized for forced induction. At minimum you’ll need:

• Upgraded injectors (60–85 lb/hr depending on power target)
• A return-style fuel system or dual in-tank pumps
• E85 compatible lines and fittings if running ethanol

Skipping the fuel upgrade is the most common mistake on budget builds. The engine will run fine at idle and cruise — then go lean at 4,500 RPM under full boost and score a piston.

Porting the Hellcat Blower Before Installation

If you’re doing this swap, porting the supercharger before it goes on the 5.7 is the right call. A ported 2.4L TVS flows more air at the same boost pressure, reducing heat buildup in the inlet tract — which is especially important on the 5.7’s smaller displacement engine where you’re asking the blower to work relatively harder.

FAS Motorsports ports hellcat superchargers for 5.7 HEMI builds specifically. We can inspect the blower for wear, service the bearings and snout seal, and port to your power target before you install it. That’s the difference between a blower that makes power from day one and one you’re chasing boost leaks on six months later.

Hellcat supercharger services for 5.7 HEMI builds →

Hood Clearance in Ram 1500 / 2500 Applications

In Ram truck applications, the hellcat blower is a taller install than stock. Measure before committing — a cowl hood or custom hood modification is often required on trucks. This isn’t a show-stopper but it needs to be in the budget.

The Bottom Line

The hellcat supercharger on a 5.7L HEMI works well when done with quality adapter hardware, proper cooling, and a professional tune. It’s not a cheap build — plan on $4,000–$7,000 for parts, fuel system, and installation — but the result is a 5.7 that drives like a Hellcat at a fraction of the cost.

For porting, inspection, and rebuild services on your hellcat blower before the swap, reach out to FAS Motorsports in Punta Gorda, FL. We’ve seen every variant of this build and can set your blower up right.