Supercharger Guide
Best Superchargers for the
2011 – 2014 Chrysler 300 6.4L SRT8: Every Kit Compared
A complete comparison of every supercharger kit available for the 2012-2014 Chrysler 300C SRT8 6.4L 392 Hemi — ProCharger and Whipple. Roots vs centrifugal, HP and torque gains, CARB compliance, Complete kits, and what to expect from each.
At a Glance
Quick Comparison
Technical Foundation
Complete vs Tuner Kit & Roots vs Centrifugal
Understanding these two concepts will help you choose the right kit. Our Supercharger Buyers Guide covers this in depth; here’s the essentials.
Complete Kit vs Tuner Kit
A Tuner Kit is the supercharger hardware only. It does not include: larger fuel injectors, upgraded MAP sensor, fuel pump (or booster), handheld programmer/flash tool, or the supercharger tune. Those components are 100% necessary to run safely. You must supply them yourself.
Tuner Kits are for (1) custom builds where you want different fuel/tuning components than the manufacturer provides, or (2) vehicles with long-tube headers, aftermarket cam, or forged internals. The basemap tune in a Complete Kit is calibrated for factory exhaust manifolds and stock internals. If you install a Complete Kit on a car with headers or a cam, the vehicle will likely run too lean — risking catastrophic engine failure.
A Complete Kit includes fuel injectors, MAP sensor, fuel pump upgrade, flash tool, and tuning. It’s 100% bolt-and-go for stock or lightly modified 300C SRT8 (intake, cat-back, throttle body only). No additional parts or custom tune required.
Roots vs Centrifugal
Roots-style (Whipple, Magnuson, Edelbrock) superchargers mount in the intake manifold. They deliver more low-mid range torque and instant throttle response. They also produce more “whine” at idle. Whipple has achieved 180+ rwhp on 6.4L 392 systems. Best for drivers who want immediate punch off the line.
Centrifugal (ProCharger, Vortech) superchargers mount off the side of the engine via a bracket. They build power toward mid-high RPM and often produce more peak horsepower. Both add significant power; choose based on driving style. Most Hemi Complete kits run 6–7 psi boost. Long-tube headers can drop boost by ~1.2–1.5 psi; Tuner Kits with custom pulley sizing compensate for modified builds.
Important
What to Know Before You Buy
Tuning & PCM (2012–2014)
2012–2014 Chrysler 300C SRT8 6.4L has an unlocked PCM — no PCM unlock required. ProCharger uses DiabloSport; Whipple uses HP Tuners. Critical: ProCharger requires you to email them your backup tune and head unit serial before installing. They send the supercharger tune via email (24–48 hrs). Do this first or your car will be down waiting. Whipple includes HP Tuners RTD flash tool. Add NGK LFR6AIX for ProCharger; Whipple includes 1-step colder plugs.
Complete vs Tuner: Which Do You Need?
Stock or simple bolt-ons (intake, cat-back, throttle body)? → Complete Kit. Headers, cam, or forged internals? → Tuner Kit with your own fuel system and custom tune. Installing a Complete Kit on a modified car risks lean AFR and engine damage. See our Buyers Guide for the full breakdown.
CARB & Emissions
Whipple Gen 6 is 50-state CARB legal for 6.4L Hemi (D-231-92). ProCharger is CARB certified for this application. Off-road-only kits cannot be registered in California. All Complete kits require 91 octane minimum. Standard warranty is 1-year; 3-year and 5-year extended warranties available through most manufacturers.
Installation & Hood Modification
Professional install recommended (8–14 hours). Note: Whipple states that Chrysler 300 requires hood modification to clear correctly. Budget for dyno tuning, fluids. Lead times: ProCharger: 1–2 business days. Whipple: 14–16 weeks (built-to-order). ProCharger does not include 1-step colder spark plugs; add NGK LFR6AIX. Hemi engines use 2 spark plugs per cylinder (16 total); order quantity 4.
Side-by-Side
Compare Both Kits
ProCharger HO Complete
Type: Centrifugal (P-1SC-1)
Boost: 7 psi
HP Gain: +200 whp on 91/93 octane
Kit: Complete — fuel, tuning, DiabloSport included
- 100% bolt-and-go Complete kit — no additional fuel or tuning required
- 50-state CARB certified for emissions compliance
- Full 2012–2014 300C SRT8 coverage
- ProCharger preferred for most Hemi apps per FastHemis Buyers Guide
- Fastest ship: 1–2 business days
Whipple Gen 6
Type: Twin-screw (Roots-style)
Boost: ~6–7 psi
HP Gain: +225 whp / +175 lb-ft
CARB: 50-state legal (D-231-92)
- 50-state CARB certified — emissions compliant
- Roots-style: low-mid torque, instant throttle response
- Highest power: +225 whp / +175 lb-ft
- HP Tuners MPVI3 OBDII interface included; 1-step colder spark plugs included
Our Picks
6.4L SRT8, stock or light bolt-ons? ProCharger HO Complete is our top pick: +200 whp, 100% bolt-and-go with fuel and tuning included, full 2012–2014 coverage, and 50-state CARB certified. ProCharger is FastHemis’s preferred centrifugal brand for most Hemi applications. Ships in 1–2 business days.
Need 50-state CARB and prefer Roots-style power? Whipple Gen 6 delivers +225 whp and +175 lb-ft with instant low-mid torque. Same technology that powers Dodge’s Drag Pak program. HP Tuners MPVI3 and 1-step colder spark plugs included. Note: Chrysler 300 requires hood modification to clear the Whipple correctly. 14–16 week lead time.
Roots vs centrifugal? Roots (Whipple) gives more low-mid torque and instant response. Centrifugal (ProCharger) builds power toward mid-high RPM. Both add significant power; choose based on driving style and lead-time preference.
ProCharger HO Complete
ProCharger HO Complete is FastHemis’s preferred centrifugal option for 2012-2014 Chrysler 300C SRT8 6.4L 392. The kit delivers +200 whp at 7 psi on 91 or 93 octane. It includes fuel injectors, MAP sensor, fuel pump upgrade, and DiabloSport i3 Platinum tuner. 100% bolt-and-go for stock or lightly modified 300C SRT8. 50-state CARB certified. Ships in 1–2 business days.
Critical: Request your tune from ProCharger before installing. Email them your backup tune and head unit serial; they reply in 24–48 hours. The tune is not pre-loaded on the i3. Add NGK LFR6AIX spark plugs (Hemi uses 16 total; order qty 4). Optional helical gears (~$100) eliminates straight-cut clatter at idle. 2012-2014 300C SRT8 has unlocked PCM — no PCM unlock required.
Pros
- 100% bolt-and-go Complete kit — no additional fuel or tuning required
- 50-state CARB certified for emissions compliance
- Full 2012–2014 300C SRT8 coverage
- ProCharger preferred for most Hemi apps per FastHemis Buyers Guide
- Fastest ship: 1–2 business days
Cons
- Does not include 1-step colder spark plugs
- Must request tune before install
- Optional helical gears add cost if you want to eliminate idle clatter
Whipple Gen 6
Whipple is FastHemis’s favorite Roots-style brand. The Gen 6 3.0L twin-screw for 2012-2014 Chrysler 300C SRT8 6.4L delivers +225 whp and +175 lb-ft at ~6–7 psi. Roots-style means more low-mid range torque and instant throttle response, plus more whine at idle. The kit includes HP Tuners MPVI3 OBDII interface (no laptop needed), 1-step colder spark plugs, Hellcat fuel injectors, billet fuel rails, and a patented dual-core, dual-pass intercooler. 50-state CARB certified (D-231-92).
Built-to-order: 14–16 week lead time. Whipple uses HP Tuners; 2012-2014 300C SRT8 has unlocked PCM so no PCM unlock required. Important: Whipple states that Chrysler 300 requires hood modification to clear correctly. Optional cold air intake is recommended. Textured Black is standard; Gloss Black, Red, Yellow, White, Orange, and Polished finishes available for extra cost.
Pros
- 50-state CARB certified — emissions compliant
- Roots-style: low-mid torque, instant throttle response
- Highest power: +225 whp / +175 lb-ft
- HP Tuners MPVI3 OBDII interface included (no laptop needed)
- 1-step colder spark plugs included
Cons
- 14–16 week lead time (built-to-order)
- Chrysler 300 requires hood modification to clear
- Optional cold air intake recommended (adds cost)
Common Questions
Frequently Asked Questions
What’s the difference between Roots and centrifugal superchargers?
Roots (positive displacement) units like Whipple deliver more low-mid range torque and instant throttle response. Centrifugal units (ProCharger) build power toward mid-high RPM and often produce more peak horsepower. Both add significant power; choose based on driving style. See our Supercharger Buyers Guide for details.
Do I need a Complete or Tuner kit?
If your 300C SRT8 is stock or has only simple bolt-ons (intake, cat-back, throttle body), get a Complete kit — it includes fuel injectors, MAP sensor, fuel pump upgrade, and tuning. If you have long-tube headers, a cam, or forged internals, you need a Tuner kit with a custom tune.
Will a supercharger void my warranty?
Under the Magnuson-Moss Warranty Act, a dealer cannot void your entire warranty for aftermarket parts. However, powertrain claims related to forced induction may be denied. Some manufacturers offer supplemental warranties.
Which kit is 50-state legal?
Both ProCharger and Whipple Gen 6 for the 2012-2014 Chrysler 300 6.4L SRT8 are CARB certified and 50-state legal.
Does the Whipple require hood modification?
Yes. Whipple states that Chrysler 300 requires hood modification to clear the supercharger correctly. Factor this into your install budget. ProCharger mounts off the side of the engine and typically does not require hood modification.
What fuel do I need?
All Complete supercharger kits require 91 octane minimum. Higher octane (93) is fine and may allow slightly more aggressive tuning.
Ready to Supercharge Your 300C SRT8?
Browse all supercharger kits for the Chrysler 300 6.4L SRT8, or contact us if you need help choosing the right kit for your goals.
