3.7L / 4.0L Engine Upgrades
DiabloSport inTune i3 Platinum Programmer: 300 / Challenger / Charger / Magnum / Ram / Durango 2005 - 2014
Diablo Sport
Regular price
$535.95
$475.95
11% off
- Unit price
- /per
Cometic MLS Head Gaskets (3.950" Bore): Chrysler / Dodge / Ram / Jeep 5.7L Hemi 2003 - 2025
Cometic Gasket
Regular price from $96.54 Up to 10% off
- Unit price
- /per
American Brother Designs Oil Cap Cover: Chrysler / Dodge / Jeep / Ram Hemi 2005 - 2024
American Brother Designs
Regular price
$101.49
$69.00
32% off
- Unit price
- /per
Cometic Timing Cover Gasket Set: Chrysler / Dodge / Jeep / Ram 5.7L Hemi / 6.1L SRT8 / 6.4L 392 / 6.2L Hellcat & Trackhawk
Cometic Gasket
Regular price
$48.06
$43.25
10% off
- Unit price
- /per
DiabloSport Trinity 2 (T2 EX) Platinum Programmer / Monitor: Chrysler / Dodge 2005 - 2014
Diablo Sport
Regular price
$818.95
$727.95
11% off
- Unit price
- /per
Vibrant O2 Sensor Restrictor Fitting (STRAIGHT) w/ Adjustable Jets (CEL Eliminator)
Vibrant
Regular price from $22.99 25% off
- Unit price
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DiabloSport inTune i3 Platinum Programmer: Jeep Grand Cherokee / Wrangler / Commander 2005 - 2014
Diablo Sport
Regular price
$535.95
$475.95
11% 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
Comp Cams Stage 2 HRT 220/230 Max Power Hydraulic CAM KIT: 5.7L Hemi / 6.4L 392 2009 - 2023 (VVT)
COMP Cams
$1,236.95
- Unit price
- /per
DiabloSport inTune i3 Programmer: 300 / Challenger / Charger / Magnum / Ram / Durango 2005 - 2014
Diablo Sport
Regular price
$535.95
$475.95
11% off
- Unit price
- /per
Cometic MLS Exhaust Manifold / Header Gaskets (Pair): Chrysler / Dodge / Jeep 5.7L Hemi 2003 - 2008
Cometic Gasket
Regular price
$44.19
$39.77
10% 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
- /per
American Brother Designs Engine Bay Tag: Chrysler / Dodge / Jeep / Ram
American Brother Designs
Regular price
$76.00
$56.00
26% off
- Unit price
- /per
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
- /per
Ripp Hi-Perf Coil Packs: Fits Dodge / Chrysler / Jeep V8 (02-26)
Ripp
from $489.46
- Unit price
- /per
6 colors





- +1 more
Comp Cams Stage 1 HRT 216/222 Max Power Hydraulic CAM KIT: 5.7L Hemi 2009 - 2023 (VVT)
COMP Cams
$1,236.95
- Unit price
- /per
DiabloSport Trinity 2 (T2 EX) Programmer / Monitor: Chrysler / Dodge 2005 - 2014
Diablo Sport
Regular price
$818.95
$727.95
11% off
- Unit price
- /per
Gates Racing Micro-V Serpentine Belt: 300 / Challenger / Charger / Magnum 5.7L Hemi 2005 - 2011
Gates
$36.76
- Unit price
- /per
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
- /per
Victor Reinz Cylinder Head Bolts: Fits Dodge / Jeep / Chrysler / Ram (03-26)
Victor Reinz
$66.73
- Unit price
- /per
Flowmaster FloxFX Exhaust System: Jeep Grand Cherokee 4.0L / 4.7L 1999 - 2004
Flowmaster
Regular price
$393.95
$314.95
20% off
- Unit price
- /per
aFe 90mm Throttle Body Kit: Dodge Challenger / Charger / Chrysler 300 5.7L / 6.1L / 6.4L (05-14)
aFe
$497.00
- Unit price
- /per
MBRP Installer Series Cat-Back Exhaust System: Jeep Grand Cherokee 4.7L & 5.7L Hemi 2005 - 2010
MBRP
Regular price
$450.87
$364.99
19% off
- Unit price
- /per
Cometic MLS Head Gaskets (4.100" Bore): Chrysler / Dodge / Ram / Jeep 5.7L Hemi 2003 - 2025
Cometic Gasket
Regular price from $96.54 Up to 36% off
- Unit price
- /per
JBA Shorty Headers (Raw Finish): Dodge Dakota & Ram 4.7L V8 2004 - 2007
JBA
Regular price
$780.33
$709.39
9% off
- Unit price
- /per
BBK Performance Header Gaskets: Chrysler 300C / Dodge Challenger / Charger / Magnum 2005 - 2008 (5.7L Hemi, 6.1L / 6.4L SRT8)
BBK
Regular price
$59.99
$49.99
17% off
- Unit price
- /per
K&N 57 Series FIPK Cold Air Intake: Jeep Commander / Grand Cherokee 5.7L Hemi 2005 - 2010
K&N Engineering
$317.99
- Unit price
- /per
MBRP XP Series Cat-Back Exhaust System: Jeep Grand Cherokee 4.7L & 5.7L Hemi 2005 - 2010
MBRP
Regular price
$599.11
$484.99
19% off
- Unit price
- /per
K&N 57 Series FIPK Cold Air Intake: Dodge Ram 4.7L V8 2002 - 2007 (1500)
K&N Engineering
$317.99
- Unit price
- /per
Gibson Ceramic Coated Performance Header: Dodge Dakota (96-03) / Durango (98-03) / Ram 1500 (96-03)
Gibson
$1,704.34
- Unit price
- /per
DiabloSport inTune i3 Programmer: Jeep Grand Cherokee / Wrangler / Commander 2005 - 2014
Diablo Sport
Regular price
$535.95
$475.95
11% off
- Unit price
- /per
K&N Air Filter: Dodge Ram 2002 - 2010 (All Models) / Ram 2011 - 2018 (All Models)
K&N Engineering
$55.19
- Unit price
- /per
DiabloSport Predator 2 Tuner: Dodge Ram / Durango / Dakota 2005 - 2018 (V6 & V8 Models)
Diablo Sport
Regular price
$532.95
$369.00
31% off
- Unit price
- /per
Cometic MLS Head Gasket (4.060" Bore, .051" Thickness): Dodge Viper 8.0L V10 1992 - 2002
Cometic Gasket
Regular price
$149.23
$134.31
10% off
- Unit price
- /per
King Engine Bearings Chrysler/Dodge Gen Iii Hemi 5.7/6.1/6.4 (Size +0.25mm) Main Bearing Set
King Engine Bearings
$33.05
- Unit price
- /per
Comp Cams Stage 2 HRT 220/230 Max Power Hydraulic Roller Camshaft: 5.7L Hemi / 6.4L 2009 - 2023
COMP Cams
$605.95
- Unit price
- /per
K&N Air Filter: Dodge Durango (98-03) / Durango (04-09) / Durango (11-26)
K&N Engineering
$67.19
- 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.