Best Mods and Customizations for the Chrysler 300: Building a Better Full-Size Sedan

The Chrysler 300 has long been the full-size sedan of choice for drivers who want bold design and rear-wheel-drive dynamics without stepping into luxury-brand territory. Whether it’s the V6 Touring trim or the HEMI-powered 300C, the platform offers a solid foundation for modification. The best Chrysler 300 mods and customizations elevate its performance, comfort, and street presence in ways that keep it relevant despite its aging bones.

Performance Upgrades That Matter

 For V6 models, intake and exhaust upgrades provide modest gains but help wake up the Pentastar engine’s flat midrange. A cold air intake paired with a high-flow cat-back exhaust system can improve throttle response and sound without triggering check engine lights or requiring a tune.

For 5.7-liter HEMI-equipped models, the options widen significantly. Tuning is essential—either with a DiabloSport or HP Tuners device—to unlock real gains. Pair this with long-tube headers, upgraded mid-pipes, and a performance camshaft, and you’re looking at 50–80 additional horsepower.

For owners chasing Hellcat-rivaling numbers, a Chrysler 300 supercharger kit (such as a ProCharger or Magnuson system) brings serious forced induction into the mix, pushing output well north of 600 hp with the right supporting mods.

Suspension & Handling Tweaks

 The stock 300 prioritizes comfort over agility. To sharpen the chassis, a set of performance-lowering springs or coilovers can reduce body roll and improve road feel. Pair this with upgraded sway bars and poly bushings, and the 300 takes on a far more planted demeanor without losing its ride quality.

Wider wheels and sticky summer tires round out the handling package. For aggressive stance and real grip, 20×9.5-inch wheels with 275/40 tires strike a good balance between form and function.

Brake and Drivetrain Upgrades

 Braking is often overlooked, but essential for higher-output builds. A big brake kit for the Chrysler 300—either from Brembo or Wilwood—improves fade resistance and delivers the stopping power needed for spirited driving. Stainless steel brake lines and high-performance pads complete the setup.

On AWD models, differential upgrades are limited. But on RWD trims, consider a limited-slip differential to improve off-the-line traction and corner exit speed. Driveshaft and axle upgrades become necessary once power climbs beyond 500 hp.

Interior Mods That Add Function

 While the 300’s interior already offers a premium feel, owners looking for more engagement can install a flat-bottom performance steering wheel, and paddle shifters, or swap in SRT seat bolstering for a more connected drive.

An upgraded infotainment system—especially with wireless Apple CarPlay/Android Auto support—can bring modern convenience to older models. Sound system improvements, including JL Audio or Focal speakers and an upgraded amp, make a noticeable difference in cabin ambiance.

Ambient lighting kits and carbon-fiber trim overlays also bring the cabin up to date visually without veering into garish territory.

Exterior Styling: Stand Out Without Overdoing It

 A Chrysler 300 looks imposing stock, but the right mods can amplify its presence. A Chrysler 300 body kit from reputable brands like Duraflex or Anderson Composites adds aggression while retaining OEM proportions. Custom grilles, LED headlight retrofits, and smoked tail lights further separate your 300 from the pack.

Lowering the car with proper fitment wheels—concave or staggered setups in gloss black or brushed aluminum—delivers curb appeal without compromising daily usability. Vinyl wraps or custom paint can push personalization even further.

Exhaust Note: Make It Sing

 The 300’s exhaust tone is a defining character trait. For HEMI models, a cat-back exhaust with an X-pipe design offers a more exotic note than the factory setup. Borla, Corsa, and Flowmaster all offer systems that balance volume with drone control.

Resonator deletes can increase the sound on a budget but may introduce rasp. A full exhaust system with long-tube headers and high-flow cats will not only sound better—it’ll perform better too.

Lighting and Visibility

 LED headlight conversions and sequential tail lights modernize the 300’s nighttime appearance. Fog light upgrades, integrated DRLs, and smoked housings refine the front-end look without venturing into aftermarket excess.

Interior LED swaps are a simple upgrade that can shift the cabin’s ambiance dramatically. Pair them with dimmer control for a more OEM-plus vibe.

The Sweet Spot Between Luxury and Muscle

 The Chrysler 300 customization scene continues to thrive because the car walks the line between premium sedan and American muscle. Whether you’re building a stealthy cruiser, a show-stopping street car, or a drag-strip sleeper, the 300 remains an accessible and capable canvas.

Invest wisely, tune carefully, and the result is a full-size sedan that doesn’t just compete—it stands apart.