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JEEP 4.0L/242 Ignitions & Electrical

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Results 1 - 24 of 237

Optima RedTop Starting 12-Volt Batteries

Optima RedTop Starting 12-volt batteries are the ultimate power source for cars, trucks, SUVs, hot rods, and other high-performance vehicles. They're engineered with unique Spiralcell technology, delivering a stronger burst of ignition power, while extending the battery life up to three times longer than conventional models. Maintenance-free RedTop AGM batteries are sealed, leak-proof, and resistant to vibrations—so you can mount them anywhere and in virtually any position on your vehicle. Order the Optima battery designed for your application, and expect a perfect start every time.

4.81 out of 5 stars ( 1525 )

$269.99

$299.99

HP Tuners VCM Suite MPVI4 Credit Pro Packages

HP Tuners Introduces VCM Suite MPVI4 Credit Pro packages, the latest evolution of their industry-leading OBDII interface. Built for professionals and enthusiasts alike, the computer programmers connect your vehicle to VCM Suite software (5.2+) for faster, smarter, and more powerful tuning and diagnostics than ever before. With upgraded hardware, expanded connectivity, and future-ready Wi-Fi capabilities, the MPVI4 redefines what's possible in performance calibration and data acquisition. Models are available with 0, 2, 4, 6, or 8 credits. HP Tuners VCM Suite MPVI4 Credit Pro packages feature: * Improved standalone logging: the most powerful device yet, capable of delivering standalone logging performance on par with VCM scanner and a wired connection * Upgraded hardware architecture: New internal processor for improved data throughput and flashing performance; 30x more memory than previous generation MPVI3 * High-speed USB-C connectivity: Faster, more reliable communication with your PC and vehicle * Bluetooth 5.2: Seamless wireless connection for scanning, logging, and TDN support * Wi-Fi ready (future update): Wireless VCM Suite connectivity coming soon * Enhanced storage and efficiency: Increased onboard memory for robust logging sessions * Improved OBDII fitment: A revised, tapered design means a more secure connection and better compatibility with even more makes/models * Built-In Pro feature set: Standard on every MPVI4, enabling standalone data logging and external sensor integration with PROLINK+ * RGB status LEDs: Clear visual indicators for power, connection, and activity status * Cross-Platform Compatibility: Works with VCM Suite (5.2+), TrackAddict, and RaceRender

3.0 out of 5 stars ( 2 )

$399.99

$799.91

Optima YellowTop Deep-Cycle 12-Volt Batteries

Optima YellowTop Deep-Cycle 12-volt batteries are high-performance, dual-purpose power sources. They're great for applications requiring repetitive amperage drain and quick recharging—like trucks with winches, commercial or public safety fleets, and vehicles loaded with electronics and accessories. YellowTops also power forklifts, tractors, and other heavy equipment. The maintenance-free AGM batteries deliver premium ignition starts, while sustaining high power levels even when system loads exceed the alternator output. Optima deep-cycle models are sealed, spill-proof, and can be mounted in most any position. They are far more resistant to vibrations than standard batteries, and will perform up to three times longer. For consistent power and faster recharges, order the YellowTop designed for your needs.

4.8 out of 5 stars ( 416 )

$319.99

$329.99

Powermaster Street Alternators

Powermaster street alternators feature all of the quality construction and dependability the company is famous for. The "electrical generators" are available in a variety of amperages and styles, allowing you to choose the best model for your specific ride and the accessories you run. So whether you need an alternator for your truck, hot rod, musclecar, sport compact, or audio competition vehicle, Powermaster gives you the power you need to get it started and keep it going.

4.63 out of 5 stars ( 1799 )

$161.99

$458.99

NGK V-Power Spark Plugs

NGK V-Power spark plugs offer economical performance for nearly any automotive application—and they're the only plugs with NGK's V-Groove technology. These plugs enhance ignitability, lower the voltage requirements of ignition systems, and have strong anti-fouling characteristics, while improving fuel mileage and acceleration performance. The V-Power plugs are also highly durable against electrical and chemical wear, making them long-life replacement plugs. Because of the V-Groove, the spark occurs at the edge of the center electrode—so heat is not absorbed by the electrode itself. This allows the flame kernel to expand quickly and efficiently for a complete burn and great performance. More than a hundred models are available, both universal and application-specific; order the plugs designed for fitment on your vehicle.

4.81 out of 5 stars ( 397 )

$1.99

$3.99

Odyssey Drycell Batteries

Odyssey sealed rechargeable drycell batteries provide high engine-cranking pulses and are capable of 400 deep cycles. They can be installed on their sides or at any angle and have a 2-year storage life at 25 degrees C.

4.86 out of 5 stars ( 226 )

$429.99

$436.99

XS Power AGM Batteries

XS Power AGM batteries are some of the lightest racing batteries on the market. Independent test results have proven that they outperform other battery models that outweigh these power providers by up to 20 lbs. Cutting-edge lead acid battery technology produces more energy in a smaller space because each cell is compressed before case insertion, resulting in efficient power-producing packages that are completely sealed with no need to ever add water. This design is ideal for the abuse of racing, making these the batteries of choice for demanding racers and Monster Truck drivers who need top performance and reliability. When you are pushing to power the impossible, you need the non-stop capabilities of the XS Power AGM batteries best suited for your application. Product features include: * Designed to be an inch shorter than what the competition offers for fitting in places where space is at a premium * Deep-cycling ability and ultra-low internal resistance results in high cranking amps and excellent vibration resistance * Variable position mounting (except upside-down) thanks to the no-spill design * Offered in 6 V, 12 V, 14 V, and 16 V models

4.65 out of 5 stars ( 274 )

$394.04

$395.99

Autolite Copper Core Spark Plugs

Autolite copper core spark plugs feature a cold-formed steel shell with precision-rolled threads, a full copper core electrode for better performance, and a one-piece terminal post to add strength. The ignition plugs use a copper-glass seal that bonds the insulator and terminal post center electrode together. This ensures full voltage at the spark gap and a 100 percent leak-proof, gas-tight seal. Autolite features an extensive application guide to cover just about everything with an internal combustion engine. Keep your engine running smoothly and reliably with Autolite replacement copper core spark plugs.

4.81 out of 5 stars ( 245 )

$1.99

$2.99

Powermaster Smooth Look Alternators

Powermaster smooth look alternators feature unique styling, with all sharp lines and edges blended for a truly smooth look. These alternators are available in a polished, brushed/satin, black powdercoated, or a chrome plated finish. They come with an exclusive tear drop design, detailed with features that match the case.

4.6 out of 5 stars ( 160 )

$163.99

$236.99

XS Power RSV Titan8 Lithium Batteries

XS Power RSV Titan8 lithium batteries are designed to maximize capacity and deep cycling abilities. Part of XS Power's Lithium Titanate Oxide (LTO) Series, they have double the amount of storage energy but only half of the instant discharge energy, giving them double the capacity rating, but half of the wattage rating. The built-in 2/0 bussing allows up to four positive and four negative hidden direct connections to each module without the need for any external exposed bussing, while still leaving two easily accessible top terminals and four series or parallel expansion terminals to easily build a bank of nearly any configuration from 12 V, 24 V, 36 V, or any configuration imaginable. XS Power RSV Titan8 BCI direct-fit models are also available.

Not Yet Reviewed

$999.99

On Sale

MSD Blaster OEM Replacement Coils

When it comes to late model performance parts, nothing beats bolt-on and direct connection components—especially when they improve performance like these new replacement MSD Blaster ignition coils. They're designed with improved materials and windings to produce a stronger spark. This improved spark helps burn the fuel mixture more efficiently, resulting in smooth idle and heightened mid-range rpm power. Choose the OEM replacement designed for your year/make/model application.

4.71 out of 5 stars ( 625 )

$78.55

$177.95


$70.65

$160.15

Painless Performance 23-Circuit Direct-Fit Jeep YJ Harnesses

Painless Performance 23-circuit direct-fit Jeep YJ harnesses fit 1987-91 YJ Jeeps. These harnesses feature a factory-style bulkhead connector that mounts the fuse block in the OEM location. Each harness includes all the connectors and terminals needed as well as a detailed manual. Painless harnesses are factory color-coded and labeled for easy installation. Includes circuits for: * Air conditioning/heat * Accessory/cigarette lighter * Backup lights * Brake lights * Charging * Dome and courtesy lights * Electric choke * Electric fuel pump * Emergency flashers * Fan relay * Fuel injection power * Fused power source * Headlights * Horn * Ignition coil * Instrument panel lighting and gauges (see notes above) * Parking lights * Radio (constant/ignition hot) * Starting * Taillights and trailer lights * Third brake light * Turn signals * Wipers and washer pump (front and rear)

3.75 out of 5 stars ( 4 )

$999.99

On Sale

SCT X3 Power Flash Programmers

These SCT X3 Power Flash programmers store up to three separate custom tunes that can increase horsepower, torque, and even fuel mileage! They feature a huge backlit LCD display for easy viewing of built-in data logging or real-time monitored vehicle data, and popular sensor data such as EGT, air/fuel ratio, and many other sources. The programmers back up your factory PCM program during installation should you ever need to return your vehicle to the stock PCM program. These SCT X3 Power Flash programmers can read and clear diagnostic trouble codes. They have dual analog inputs, user-adjustable vehicle parameters, and include a USB interface cable.

3.29 out of 5 stars ( 7 )

$379.00


$341.10

XS Power XV Automotive Series Lithium Batteries

XS Power XV Automotive Series lithium batteries are lightweight, powerful, and offer five times the life over lead acid and AGM batteries. These Lithium Titanate batteries are available for automotive applications in many common BCI group sizes for a direct fit in your vehicle.

5.0 out of 5 stars ( 5 )

$499.99

Banks Power PedalMonster Throttle Response Enhancers

Banks Power PedalMonster is the first OBD-II connected throttle sensitivity controller for gas and diesel vehicles. Controlled via Banks iDash or mobile app, PedalMonster is the only module of its kind to offer safety features like ActiveSafety, Reverse Safety, and Adjustable Low-Speed Trim. Select the model that best suits your application. Product features: * City, Sport, and Track modes, each with 10 sensitivity levels * OBD-II connected * ActiveSafety failsafe circuitry with Health Monitoring * Reverse safety returns pedal to stock in reverse gear * Adjustable Low-Speed Trim controls how fast sensitivity is added at slow speeds * Powered by +12 V via OBD, not low-overhead pedal circuit * Controlled by iDash DataMonster, iDash SuperGauge and mobile app * View PedalMonster's activity in real-time via iDash and mobile app * Simple plug-and-play installation * Warranty friendly. Does not leave footprint after removal

4.74 out of 5 stars ( 38 )

$319.00

Proform Street/Strip HEI Distributors

Proform's Street/Strip HEI distributors have a variety of improvements over stock HEI distributors, such as a 50,000 V coil, a premium hi-dielectric cap with brass terminals, both upper and lower bushings for added durability, a low-saturation ignition module, and no voltage-reducing ballast resistors. These units offer calibrated advance curves that are optimized for maximum combustion efficiency, and the elimination of detonation damage and throttle ping. The distributors offer longer-term durability and a higher voltage spark that permits a bigger spark plug gap, resulting in more power and reduced plug fouling. The Ford models' internal coil and module make it possible for Blue Oval owners to avoid the unsightly wiring of stock Ford electronic ignitions. By eliminating the stock Ford or AMC ballast resistor, you'll get more ignition voltage, resulting in an improved spark. Another advantage to switching to HEI is access to easily-found HEI replacement parts. The Ford units are also assembled with upper and lower bushings, an upgrade from stock distributors that only have a single bushing. They're easy to install by connecting one 12 V hot wire to the distributor, making them a quick performance upgrade.

4.06 out of 5 stars ( 166 )

$239.99

Crown Automotive Oil Pump Drive Assemblies

A worn oil pump drive assembly will probably trigger a check engine light and will make a funny squeaking sound that has been described as a laughing barrel of monkeys, however it is no laughing matter. The factory design poses a lack of lubrication, that could result in premature failure. Crown Automotive oil pump drive assemblies (OPDA) feature redesigned internals to eliminate the problems with the factory units, a seal under the upper bearing which caused the bearing to fail prematurely. Crown's OPDA has the seal relocated to above the upper bearing and an oil groove in the shaft which is designed to bring oil up to both the upper and lower bearings. Replace your Jeep's worn unit with the peace-of-mind offered with Crown oil pump drive assemblies.

4.68 out of 5 stars ( 22 )

$107.99

E3 Spark Plugs

Energy, efficiency, and ecology--that's the E3 equation! The unique patented electrode configuration of the E3 spark plugs increases the amount of combustion pressure created during each power stroke of an engine. This, of course, results in a marked increase in power output, fuel economy, and reduced emissions in all gasoline engines.

4.63 out of 5 stars ( 707 )

$7.99

$8.49

NTK Oxygen Sensors

NTK is the world's leading supplier of OEM oxygen sensors. They're individually tested to ensure the highest level of quality and reliability—designed to continuously detect the composition of exhaust gases. As the output from the sensors changes, the ECU instructs the fuel mixing system to alter the mixture. This ensures that the air/fuel mix is always correct and promotes efficiency. A new NTK oxygen sensor can help lower emissions, improve fuel mileage and engine efficiency, and extend catalyst life. These components meet or exceed OE specs and are equipped with waterproof, factory-fitted connectors to ensure a perfect fit every time. Order the model recommended for your vehicle.

4.82 out of 5 stars ( 84 )

$27.99

$50.99

On Sale

DiabloSport Trinity 2 EX Platinum Performance Programmers

DiabloSport Trinity 2 EX Platinum Performance programmers are game-changers! Trinity (T2) EX units are extremely capable performance tuners and feature-packed monitor/data logger devices—offering the best of both worlds. They feature an impressive, high-resolution 5 in. capacitive touchscreen, full swipe functionality, and industry-leading gauge designs; plus, jaw-dropping power potential and a powerful, yet simple user interface. DiabloSport Trinity 2 EX Platinum Performance programmers feature: * Full-color, high-definition 5 in. touchscreen * Lightning fast read/write times * Performance tuning for mileage, towing, daily driving, and performance * One-Touch, easy menu navigation * Full data-logging capability * Read and clear diagnostic trouble codes * Multi-vehicle licenses available * Correct speedometer and adjust speed/rev limiters (Options, features and coverage may vary, based on vehicle application) * AFM/MDS active fuel management options (Options, features and coverage may vary, based on vehicle application)

3.76 out of 5 stars ( 33 )

$699.95


$628.95

On Sale

MSD 8.5mm Super Conductor Spark Plug Wire Sets

MSD 8.5mm Super Conductor spark plug wire sets feature a special helically wound core that has just 40-50 ohms of resistance per foot—but with an RFI suppression equal to a 1,500 ohm wire. In fact, each foot of finished wire includes 40 ft. of tightly wound copper for superior conductivity. This winding procedure, combined with a ferro-magnetic impregnated center core, produces an extremely effective Electro Magnetic Interference "choke." This choke, or suppression capability, keeps the EMI inside the wire where it cannot interfere with other electronics on your vehicle. A tough, 8.5mm synthetic/silicone jacket over an extra-heavy glass braid and dielectric insulator keeps the current guided to the plugs. Underneath the high-temperature boots, dual crimp stainless steel terminals feature snap-locks to ensure a secure fit. Each set comes with clip-on cylinder markers for easy identification. MSD's 8.5mm Super Conductor wire sets are available in custom or universal-fit applications, assembled or not, with a variety of terminal and boot end options.

4.65 out of 5 stars ( 1974 )

$155.95


$140.35

$172.95

Odyssey Performance Series Batteries

Odyssey Performance Series batteries are designed to handle the increased use of on board accessories in today's vehicles. They combine long service life, high reliability, and deep cycle capabilities. Performance batteries provide all the reliability of the Odyssey Extreme Series batteries, without the high cold cranking amps or reserve capacity many people may not require. The Performance Series batteries contain flat plates made of 99.99 percent pure lead--not lead alloy, like many conventional batteries.

4.97 out of 5 stars ( 63 )

$361.99

$377.99

Summit Racing™ Distributor Cap and Rotor Kits

Simplify your tune-ups and keep them budget-friendly with our Summit Racing™ cap and rotor kits. These affordable kits are molded from premium materials and have brass or aluminum inserts depending on application.

4.39 out of 5 stars ( 379 )

$32.99

Autolite XP Xtreme Performance Spark Plugs

Autolite XP Xtreme Performance spark plugs feature an iridium-enhanced, .6mm, fine-wire center electrode design and patented platinum side wire technology. They will provide better overall durability and a more focused ignition to produce higher ignitability and improved performance. The Autolite XP Xtreme Performance spark plugs use a nickel plated shell and multi-rib insulator. Whether you have a high performance street car, race car, or daily driver, Autolite XP Xtreme Performance spark plugs will give you the power and consistency that you have been looking for.

4.68 out of 5 stars ( 19 )

$8.99

$12.99

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