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3.7L / 4.0L Engine Upgrades

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199 Results

Kleinn Key Start Air Horn System: Fits Dodge/Ram/Jeep 2008-2020
usa

Kleinn Key Start Air Horn System: Fits Dodge/Ram/Jeep 2008-2020

Kleinn Air Horns

Regular price $207.99 $179.99 13% off

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Flowmaster 40 Series Chambered Muffler: Fits Chrysler / Dodge / Ram (04-14)
Flowmaster 40 Series Chambered Muffler: Fits Chrysler / Dodge / Ram (04-14)
usa

Flowmaster 40 Series Chambered Muffler: Fits Chrysler / Dodge / Ram (04-14)

Flowmaster

Regular price $112.95 $101.95 10% off

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per 

MBRP Muffler Replacement: Dodge Ram 4.7L & 5.7L Hemi 1500 (09-10) / Ram 5.7L Hemi 1500 (11-24)
MBRP Muffler Replacement: Dodge Ram 4.7L & 5.7L Hemi 1500 (09-10) / Ram 5.7L Hemi 1500 (11-24)

MBRP Muffler Replacement: Ram 1500/1500 Classic 11-24 5.7L/4.7L/3.6L/3.0L EcoDiesel

MBRP

Regular price $426.16 $344.99 19% off

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per 

MagnaFlow High Flow Catalytic Converter: Jeep Grand Cherokee 2007 - 2010 3.7L
MagnaFlow High Flow Catalytic Converter: Jeep Grand Cherokee 2007 - 2010 3.7L
usa
American Brother Designs Custom Coolant Reservoir Cap Cover: Fits Dodge / Jeep / Ram (09-26)
American Brother Designs Custom Coolant Reservoir Cap Cover: Fits Dodge / Jeep / Ram (09-26)
cbp
usa
American Brother Designs Power Steering Fluid Cap Cover: Chrysler 300 (05-14) / Dodge Challenger / Charger / Magnum (05-14)
American Brother Designs Power Steering Fluid Cap Cover: Chrysler 300 (05-14) / Dodge Challenger / Charger / Magnum (05-14)
usa

American Brother Designs Power Steering Fluid Cap Cover: 300, Challenger, Charger & Magnum 2005 - 2014

American Brother Designs

Regular price $109.00 $59.00 46% off

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Flowmaster Super 50 Series Chambered Muffler: Fits most Chrysler/Dodge 04-13
Flowmaster Super 50 Series Chambered Muffler: Fits most Chrysler/Dodge 04-13
usa

Flowmaster Super 50 Series Chambered Muffler: Fits most Chrysler/Dodge 04-13

Flowmaster

Regular price $224.95 $199.95 11% off

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per 

Flowmaster 40 Series Chambered Muffler: Fits Chrysler / Dodge (04-13)
Flowmaster 40 Series Chambered Muffler: Fits Chrysler / Dodge (04-13)
usa

Flowmaster 40 Series Chambered Muffler: Fits Chrysler / Dodge (04-13)

Flowmaster

Regular price $152.95 $135.95 11% off

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per 

Flowmaster Super 40 Series Chambered Muffler: Fits Chrysler / Dodge (04-14)
Flowmaster Super 40 Series Chambered Muffler: Fits Chrysler / Dodge (04-14)
usa

Flowmaster Super 40 Series Chambered Muffler: Fits Chrysler / Dodge (04-14)

Flowmaster

Regular price $168.95 $149.95 11% off

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Flowmaster Super 40 Series Chambered Muffler: Fits Chrysler / Dodge (04-13)
Flowmaster Super 40 Series Chambered Muffler: Fits Chrysler / Dodge (04-13)
usa

Flowmaster Super 40 Series Chambered Muffler: Fits Chrysler / Dodge (04-13)

Flowmaster

Regular price $192.95 $170.95 11% off

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per 

Flowmaster 40 Series Delta Flow Muffler: Fits Chrysler / Dodge / Ram 1500 (04-14)
Flowmaster 40 Series Delta Flow Muffler: Fits Chrysler / Dodge / Ram 1500 (04-14)
usa

Flowmaster 40 Series Delta Flow Muffler: Fits Chrysler / Dodge / Ram 1500 (04-14)

Flowmaster

Regular price $168.95 $149.95 11% off

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AFE Air Filter: Dodge Dakota / Durango (All Models) 97-11
AFE Air Filter: Dodge Dakota / Durango (All Models) 97-11
usa

AFE Air Filter: Fits Most Dodge 5.7L/5.2L/3.9L/3.6L (92-11)

aFe

from $91.00

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per 

2 filter types
  • Pro 5R (Oiled)
  • Pro Dry-S (Non-Oiled)
Liqui Moly Top Tec 6600 Motor Oil: Fits Most Models
Liqui Moly Top Tec 6600 Motor Oil: Fits Most Models

Liqui Moly Top Tec 6600 Motor Oil: Fits Most Models

LIQUI MOLY

$89.70

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per 

Performance Upgrades for Your 3.7L V6 and 4.7L V8 Mopar Engines

The 3.7L V6 and 4.7L V8 engines serve as reliable, versatile Mopar powerplants found in various Dodge and Jeep models. These engines respond well to targeted performance upgrades that improve power delivery, throttle response, and durability while maintaining everyday drivability. Optimizing these engines with the right parts can enhance towing capability and add spirited driving performance.

Key Benefits of Upgrading Your 3.7L and 4.7L Engines

Both the 3.7L and 4.7L engines offer solid factory foundations, but bolt-on upgrades can unlock additional efficiency and power. Enhancements to intake and exhaust systems improve airflow, while ignition and tuning components refine combustion and throttle response. These improvements help your engine run stronger and more efficiently under various driving conditions.

  • Improved torque for towing and hauling
  • Enhanced throttle response and horsepower gains
  • Better engine efficiency and reliability
  • Maintains daily drivability with quality parts

Choosing the Right Performance Parts for Your Mopar V6 or V8

When selecting upgrades for the 3.7L or 4.7L, focus on components that complement the engine’s design and intended use. Cold air intakes and throttle body enhancements increase airflow, while exhaust headers and cat-back systems reduce backpressure. Upgrading ignition components and spark plugs ensures a stronger, more consistent spark. Finally, performance tuners and calibration tools optimize fuel and ignition timing for maximum efficiency.

Explore 3.7L and 4.7L Engine Upgrades at FastHemis

Whether you’re aiming to boost torque for towing or increase horsepower for spirited driving, FastHemis offers a curated selection of performance parts tailored to your 3.7L or 4.7L Mopar engine. Shop our collection to find intake kits, exhaust systems, ignition upgrades, and tuning solutions designed to unlock your engine’s full potential.

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