Do you remember the frustration of turning a key only to have your classic engine sputter, cough, and refuse to start? For many car enthusiasts, the dream of a powerful engine is often ruined by the unpredictable nature of an old carburetor. While vintage engines have soul, they often lack the reliability and efficiency we crave for our modern adventures on the road.
Switching to an aftermarket Electronic Fuel Injection (EFI) system is the ultimate upgrade, but the process can feel overwhelming. With dozens of brands, complex wiring diagrams, and varying price tags, it is easy to feel lost before you even pop the hood. Many builders worry about wasting money on a system that is too difficult to tune or incompatible with their specific setup. You deserve a smooth engine that performs perfectly every time you hit the gas pedal.
In this post, we will cut through the technical noise and break down exactly what you need to know to find the right EFI system for your project. We will explore the key features that actually matter, help you avoid common installation pitfalls, and point you toward the most reliable options on the market. By the end of this guide, you will have the confidence to ditch the carburetor for good and finally unlock the consistent, high-performance power your vehicle deserves. Let’s dive into the world of modern fuel management and get your engine running better than ever.
Top Aftermarket Efi Recommendations
- Compatible With Polaris Side by Side(s): RANGER XP 800 (2012), RANGER 800 EFI (2013)
- Replaces Polaris no(s): 2684979-070 // Length: 54" // Width: 18"
- DirectFit Seat Bottom Ready To Install With All Mounting Hardware
- IMPORTANT NOTE: We provide foil tape to apply to the bottom of your seat according to what your model requires, if your seat has a heat shield installed it is important that you remove that from your original seat and install it on our seat. If your seat has a heat shield, it will be attached to the seat bottom with screws, our seat has provisions to use the same screws and re-install the heat shield.
- Design meets or exceeds ASME B40.100 pressure gauge standard
- Ideal for use in applications where vibration or pulsation is present
- Glycerine filled for added durability
- Stainless steel case and bezel
![[For Midsize Models Only] E-2684626-070 DirectFit™ Seat Bottom for Polaris Ranger 800 EFI (2014), Crew 570 EFI (2014), 4X4 500 EFI (2011)](https://m.media-amazon.com/images/I/21pzMAObuSL._SL160_._SL160_.jpg)
- This seat is for Midsize models ONLY. Please confirm fitment with us if you are not 100% sure it will fit your YEAR AND MODEL.
- Compatible With Polaris Side by Side(s): M1400 Gas (2016), M1400 Gas (2015), Ranger EV/LEV 4X4 (2012) , Polaris LSV 4X4 (2012), Ranger 400 4X4 (2012), Ranger 500 4X4 Crew (2012), Ranger 500 4X4 (2012), Ranger 48V EV Midsize/Intl (2013), Ranger 400 Midsize (2013), Ranger 500 Midsize (2013), Ranger 500 Crew Midsize (2013), Ranger 800 EFI Midsize (2013), Ranger EV Midsize/Intl (2014), Ranger 4X4 400 (2014)
- Compatible With Polaris Side by Side(s): Ranger 570 Intl (2014), Ranger 570 EFI (2014), Ranger 800 EFI Midsize (2014), Ranger Crew 570 EFI (2014), Ranger 4X4 500 EFI (2011)
- Replaces Polaris (no)s: 2684626-070, 2684886-070
- Blow Molded Plastic Bottom With Black Vinyl, This Does Result in The Seat Sitting More Firm Than The Original
- Condition:New|Brand:Unbranded|Type:Fuel Filter|Number in Pack:2|Packa Contents:2 x Fuel Filter|Power Source:Does not apply|Compatible Model:/|MPN:Does not apply|UPC:Does not apply
- High-Quality Materials: Made from premium materials to ensure durability.
- Perfect Fit: Precisely matched using OE numbers, ensuring seamless installation and perfect fit.
- Superior Performance: Delivers exceptional performance enhancements in comfort, safety, and fuel efficiency.
- Safety Assurance: Complies with strict industry standards , ensuring product safety and reliability.
- Product Color: Please Refer To The Product Image
- Product Specifications: Aftermarket Aluminum Base Oil Cooler (Cv Efi)
- Wide Compatibility: For Kohler ECH730 ECH740 ECH749 ECV730 ECV740 ECV749 PCV680 Replaces 2459442S 24 594 42-S ; More Fitments Please Refer To The Product Descriptions
- Package Includes: 1 PC Aftermarket Aluminum Base Oil Cooler (Cv Efi)
- Customer Attention: Before You Buy The Product, Please Check The Picture And Description Very Carefully, To Ensure It Is The Right Item You Need
- Compatible With Polaris Side by Side(s): RANGER 6X6 700 EFI (2009), RANGER 6X6 700 EFI (2008), RANGER 4X4 700 EFI CREW (2009), RANGER 4X4 700 EFI CREW (2008)
- Replaces Polaris no(s): 2683947-030
- DirectFit Seat Bottom Ready To Install With All Mounting Hardware
- Package Quantity: 1
- Replaces Polaris (no)s: 2683817-070 // For Matching Seat Back Order Part# E-2683124-070
- This seat includes foil tape installed on the seat bottom
- Compatible With Polaris Side by Side(s): RANGER XP (2005), RANGER 500 2X4/4X4 (2006), RANGER 500 4X4 EFI (2006), RANGER XP 4X4 700 (2006), RANGER 6X6 700 EFI (2006), RANGER 500 2X4/4X4 (2007), RANGER 6X6 700 EFI (2007), RANGER 500 4X4 EFI (2007), RANGER 4X4 700 EFI /LE (2007), RANGER 500 2X4 (2008), RANGER 500 4X4 EFI (2008), RANGER 4X4 700 EFI/XP (2008), RANGER 500 2X4 CARB (2009)
- Package Quantity: 1
- If you are unsure this will fit your machine please send us your model/year and we will check it for you
- 340 LPH E85 Compatible
- Designed for in-tank use only
- Compact enough to fit in existing hanger assemblies without modification
- Complete kit with all drop parts, accessories and installation instructions
- Inlet filter meets or exceeds original equipment specifications and provides improved filtration/durability
The Ultimate Guide to Aftermarket EFI Systems
Switching from a carburetor to an aftermarket Electronic Fuel Injection (EFI) system changes how your engine runs. It improves fuel efficiency, starting power, and overall performance. Whether you own a classic muscle car or a custom project, an EFI system makes driving smoother and more reliable.
Key Features to Look For
- Self-Tuning Capability: The best systems adjust fuel maps automatically while you drive. This saves you from needing a professional tuner.
- Handheld Controller: Look for a touchscreen display. It allows you to monitor engine data and change settings easily.
- Sensor Compatibility: Ensure the system works with your current sensors, such as oxygen (O2) and coolant temperature sensors.
- Ease of Installation: Many modern kits come as a “bolt-on” setup. These replace your carburetor directly without needing a new intake manifold.
Important Materials
Quality matters when dealing with fuel. High-end systems use aircraft-grade aluminum for the throttle body. This material resists heat and prevents warping. Fuel lines should be made of braided stainless steel or high-pressure rubber rated for fuel injection. These materials prevent leaks and handle the high pressure required by fuel pumps.
Factors That Improve or Reduce Quality
What Improves Quality?
Precision manufacturing improves quality. Systems that use high-quality fuel injectors provide a better spray pattern. This leads to a cleaner burn. Also, a strong wiring harness with weather-proof connectors ensures the system stays reliable in rain or heat.
What Reduces Quality?
Cheap fuel pumps often fail early. If the pump cannot keep up with the engine, the car will stall. Poor software also hurts performance. Systems that are difficult to program or have “glitchy” displays will frustrate the user.
User Experience and Use Cases
Aftermarket EFI is great for drivers who want a modern feel in an older car. You will notice that your engine starts instantly, even on cold mornings. You will also spend less time at the gas pump. These systems are perfect for weekend cruisers, drag racers, and daily drivers that need more consistency than a carburetor can offer.
10 Frequently Asked Questions (FAQ)
Q: Is installing an EFI system difficult?
A: Most modern kits are designed for DIY enthusiasts. If you can change a carburetor, you can likely install an EFI system.
Q: Do I need a new fuel pump?
A: Yes. EFI systems require much higher fuel pressure than carburetors. You must use an EFI-rated pump.
Q: Will my car get better gas mileage?
A: Most users see a noticeable improvement in fuel economy because the computer controls the fuel mix perfectly.
Q: Can I use my old intake manifold?
A: Most “throttle body injection” kits fit directly onto a standard 4-barrel carburetor intake manifold.
Q: Does the system need a laptop to tune?
A: Many kits use a handheld controller. A laptop is only needed for very advanced custom tuning.
Q: Will it work in cold weather?
A: Yes. EFI systems automatically adjust for temperature, making cold starts much easier.
Q: Do I need to remove my ignition system?
A: Usually, no. However, some EFI systems work better if they control your ignition timing as well.
Q: How long do these systems last?
A: With proper fuel filtration, a high-quality EFI system can last for many years of daily driving.
Q: Is the system noisy?
A: The fuel pump may make a slight humming sound. This is normal and usually hidden by the engine noise.
Q: What happens if the computer fails?
A: High-quality systems have built-in safety modes. Always buy from a reputable brand with good customer support.