3.7L / 4.0L Engine Upgrades
Vibrant O2 Sensor Restrictor Fitting (STRAIGHT) w/ Adjustable Jets (CEL Eliminator)
Vibrant
Regular price from $22.99 25% off
- Unit price
- /per
American Brother Designs Washer Fluid Cap Cover: Chrysler, Dodge, Jeep & Ram 2005 - 2025
American Brother Designs
Regular price
$109.00
$59.00
46% off
- Unit price
- /per
American Brother Designs Radiator Cap Cover: Chrysler, Dodge, Jeep & Ram 2005 - 2025
American Brother Designs
Regular price
$109.00
$59.00
46% off
- Unit price
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Ripp Magnetic Engine Oil Drain Plug: Fits Most Chrysler / Dodge / Jeep / Ram V6 & V8 Models (2003-2024)
Ripp
$24.95
- Unit price
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DiabloSport Modified PCM + i3 Programmer Combo: 2009+ Charger/Challenger/300 5.7L Hemi
Diablo Sport
from Free
American Brother Designs Coolant Reservoir Cap Cover: Chrysler, Dodge, Jeep & Ram 2005 - 2025
American Brother Designs
Regular price
$109.00
$59.00
46% off
- Unit price
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Deatschwerks 60lb/hr Fuel Injectors: Fits Most Dodge/Ram (03-23)
Deatschwerks
$699.00
- Unit price
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Pedal Commander Bluetooth Throttle Response Controller: 300 / Challenger / Charger / Magnum 2007 - 2023 (All Models)
Pedal Commander
Regular price
$349.99
$299.99
14% off
- Unit price
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DeatschWerks Matched 550cc USCAR EV14 Fuel Injectors: Fits Most Dodge/Ram (03-23)
Deatschwerks
$649.00
- Unit price
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American Brother Designs Coolant Reservoir Cap Cover: Fits Jeep / Dodge / Ram (09-26)
American Brother Designs
Regular price
$109.00
$59.00
46% off
- Unit price
- /per
Edge Digital Monitor Insight CTS3: Fits Most Domestic Gas and Diesel Trucks 1996-2024 w/ Windshield Mounting Bracket
Edge
Regular price
$575.95
$549.95
5% off
- Unit price
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MBRP Cat-Back 3" Single Side Exhaust System: Dodge Dakota 05-07
MBRP
Regular price
$568.22
$459.99
19% off
- Unit price
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American Brother Designs Washer Fluid Cap Cover: Jeep Wrangler (18-25) & Gladiator (20-25)
American Brother Designs
Regular price
$109.00
$59.00
46% off
- Unit price
- /per
American Brother Designs Radiator Cap Cover: 300, Challenger, Charger & Magnum 2005 - 2014
American Brother Designs
Regular price
$109.00
$59.00
46% off
- Unit price
- /per
JBA Shorty Headers (Raw Finish): Dodge Ram 1500/Ram 2500/Ram 3500 03-08 5.9L Diesel/5.7L/3.7L
JBA
Regular price
$968.75
$880.68
9% off
- Unit price
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Superchips Wireless Amp'd 2.0 Pedal Controller: Fits Most Dodge / Ram / Chrysler Models (2005-2026)
Superchips
Regular price
$322.95
$299.95
7% off
- Unit price
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Bully Dog GT Platinum Tuner: Fits Most Chrysler/Dodge/Jeep/Ram (03-14)
Bully Dog
$399.00
- Unit price
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King Chrysler Dodge Hemi 5.7L/6.1L V8 Performance Rod Bearing Set - Size STDX
King Engine Bearings
$207.65
- Unit price
- /per
Deatschwerks 72lb/hr Fuel Injectors: Fits Most Dodge/Ram (03-23)
Deatschwerks
$719.00
- Unit price
- /per
Deatschwerks 95lb/hr Fuel Injectors: Fits Most Dodge/Ram (03-23)
Deatschwerks
$719.00
- Unit price
- /per
DiabloSport Trinity 2 (T2 EX) Programmer / Monitor: Jeep Vehicles 2005 - 2014
Diablo Sport
Regular price
$806.95
$749.95
7% off
- Unit price
- /per
MagnaFlow BRE Exhaust Kit: Jeep Commander / Grand Cherokee 05-10 5.7L/3.7L
Magnaflow
$318.00
- Unit price
- /per
Superchips F5 Flashpaq Tuner: Fits Dodge / Ram / Chrysler (98-14)
Superchips
Regular price
$518.95
$499.95
4% off
- Unit price
- /per
K&N Engineering 57 Series Cold Air Intake: Jeep Commander / Grand Cherokee 05-10 3.7L V6
K&N Engineering
$317.99
- Unit price
- /per
Flowmaster 40 Series Chambered Muffler: Fits Chrysler / Dodge / Ram (04-14)
Flowmaster
Regular price
$112.95
$101.95
10% off
- Unit price
- /per
Liqui Moly Special Tec LL Motor Oil: Fits Most Chrysler / Dodge / Jeep Models
LIQUI MOLY
$107.70
- Unit price
- /per
JBA Shorty Headers (Raw Finish): Fits Most Dodge 8.0L/5.9L Diesel/5.7L/5.2L/3.9L/3.7L (96-03)
JBA
Regular price
$687.31
$624.83
9% off
- Unit price
- /per
Gibson Black Ceramic Rolled Edge Angle Exhaust Tip: Fits Most Dodge/Ram 6.2L/5.7L/3.6L/3.0L EcoDiesel (09-23)
Gibson
$304.44
- Unit price
- /per
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
- Unit price
- /per
MagnaFlow High Flow Catalytic Converter: Jeep Grand Cherokee 07-10
Magnaflow
$1,409.00
- Unit price
- /per
American Brother Designs Custom Coolant Reservoir Cap Cover: Fits Dodge / Jeep / Ram (09-26)
American Brother Designs
$59.00
- Unit price
- /per
American Brother Designs Custom Washer Fluid Cap Cover: Jeep Wrangler (18-25) & Gladiator (20-25)
American Brother Designs
$59.00
- Unit price
- /per
American Brother Designs Custom Washer Fluid Cap Cover: Jeep Wrangler JK 2007 - 2018
American Brother Designs
$59.00
- Unit price
- /per
American Brother Designs Custom Radiator Cap Cover: 300, Challenger, Charger & Magnum 2005 - 2014
American Brother Designs
$59.00
- Unit price
- /per
American Brother Designs Custom Power Steering Fluid Cap Cover: Fits Chrysler / Dodge (05-14)
American Brother Designs
$59.00
- Unit price
- /per
American Brother Designs Washer Fluid Cap Cover: Jeep Wrangler JK 2007 - 2018
American Brother Designs
Regular price
$109.00
$59.00
46% off
- Unit price
- /per
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
- Unit price
- /per
aFe Magnum FLOW Pro DRY S Air Filter (F&R): Fits Most Dodge 5.7L/5.2L/3.9L (94-10)
aFe
$76.00
- Unit price
- /per
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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.