Swapping out your fuel injectors on a 5.7 Hemi can really wake up your engine. It’s not just about performance, though. Sometimes, old injectors get clogged or start leaking, causing rough idling and poor fuel economy. Upgrading can solve those problems and even give you a little extra horsepower. I’ve been tinkering with engines for years, and the right injectors make a noticeable difference.
Product Overview / Quick Summary
- Fuel Injector Connection 5.7L Hemi Injectors: Best overall for balanced performance and reliability.
- Bosch 0280158233 Fuel Injectors: Top choice for high-performance applications and increased horsepower.
- Mopar OEM Fuel Injector: Ideal for maintaining factory performance and reliability.
- Delphi Fuel Injector: Great value option offering good performance at an affordable price.
- AUS Injection MP-10712 Fuel Injector Set: Budget-friendly upgrade for improved fuel delivery and throttle response.
Top 5 Best Fuel Injectors For 5.7 Hemi
Fuel Injector Connection 5.7L Hemi Injectors
These injectors from Fuel Injector Connection are a solid all-around choice. They’re designed specifically for the 5.7L Hemi, offering improved fuel atomization and a smoother idle. You’ll likely notice a more responsive throttle.
Pros:
- ✅ Improved fuel atomization for better combustion
- ✅ Smoother idle and enhanced throttle response
- ✅ Direct fit for 5.7L Hemi engines
Cons:
- ❌ Higher price point compared to some alternatives
- ❌ May require custom tuning for optimal performance
- ❌ Not ideal for heavily modified engines requiring very high flow rates
Verdict: A great choice for those looking for a balanced upgrade that improves both performance and fuel efficiency in a stock or mildly modified 5.7L Hemi.
Bosch 0280158233 Fuel Injectors
The Bosch 0280158233 injectors are popular for a reason. They flow more fuel than the stock injectors, making them a good choice if you’ve added a supercharger or other performance upgrades. Plus, Bosch is a trusted name in automotive components.
Pros:
- ✅ Higher flow rate supports increased horsepower
- ✅ Improved throttle response
- ✅ Reliable Bosch quality
Cons:
- ❌ May require ECU tuning for proper operation
- ❌ Can be overkill for stock engines
- ❌ Might affect fuel economy if not properly tuned
Verdict: If you’re chasing serious horsepower gains with modifications, these Bosch injectors are an excellent option, but be prepared for tuning.
Mopar OEM Fuel Injector
Sometimes, sticking with the original is the best way to go. These Mopar OEM fuel injectors are the same ones that came with your 5.7 Hemi from the factory. If you just need a replacement or want to maintain that stock feel, these are a safe bet.
Pros:
- ✅ Guaranteed fit and compatibility
- ✅ Maintains factory performance and reliability
- ✅ No modifications or tuning required
Cons:
- ❌ No performance gains over stock injectors
- ❌ Can be more expensive than aftermarket options
- ❌ May not be suitable for modified engines
Verdict: Perfect for those who want to restore their engine to its original condition without any guesswork.
Delphi Fuel Injector
Delphi fuel injectors offer a good balance of performance and affordability. They provide a slight upgrade over stock injectors and can improve fuel delivery. I’ve used Delphi parts before and found them to be reliable for the price.
Pros:
- ✅ Affordable price point
- ✅ Improved fuel delivery compared to worn stock injectors
- ✅ Decent performance upgrade for the price
Cons:
- ❌ Not as high-performing as premium options
- ❌ May not be suitable for high-horsepower applications
- ❌ Limited information on precise flow rates
Verdict: A solid choice for those looking for a budget-friendly upgrade that offers improved performance over worn-out stock injectors.
AUS Injection MP-10712 Fuel Injector Set
For those on a tight budget, the AUS Injection MP-10712 fuel injector set is worth considering. These injectors provide improved fuel delivery and throttle response at a very affordable price. They’re a good option for a simple refresh without breaking the bank.
Pros:
- ✅ Very affordable
- ✅ Improved throttle response
- ✅ Easy installation
Cons:
- ❌ May not offer significant performance gains
- ❌ Durability may not be as high as premium brands
- ❌ Limited flow rate information
Verdict: A budget-friendly choice for those seeking a basic upgrade or replacement without spending a lot of money.
Buying Guide
Choosing the right fuel injectors for your 5.7 Hemi depends on your goals and budget. Here are some things to consider:
- Engine Modifications: If you’ve added a supercharger, turbocharger, or other performance upgrades, you’ll need injectors with a higher flow rate to supply enough fuel. Stock injectors won’t cut it.
- Fuel Flow Rate: Fuel injector flow rate is measured in pounds per hour (lbs/hr) or cubic centimeters per minute (cc/min). Make sure the flow rate matches your engine’s needs. Too little fuel can cause engine damage, while too much can lead to poor fuel economy.
- Injector Type: There are different types of fuel injectors, such as EV1, EV6, and newer designs. Ensure the injectors you choose are compatible with your 5.7 Hemi’s fuel rail and electrical connectors.
- Spray Pattern: The spray pattern of the fuel injector affects how well the fuel atomizes and mixes with air. A good spray pattern can improve combustion efficiency and reduce emissions. Look for injectors with a multi-hole nozzle for better atomization.
- Brand Reputation: Stick with reputable brands like Bosch, Delphi, Fuel Injector Connection, and Mopar. These brands are known for their quality and reliability. Avoid generic or unknown brands, as they may not perform as well or last as long.
- Tuning: Upgrading to higher-flow fuel injectors often requires ECU tuning to ensure proper air-fuel ratios and engine performance. Consider the cost of tuning when budgeting for new injectors. A proper tune can make a big difference in how the engine runs.
- Budget: Fuel injectors range in price from affordable to premium. Determine how much you’re willing to spend and choose injectors that fit your budget. Remember that sometimes, spending a little more can get you better quality and performance in the long run.
FAQs
Here are some frequently asked questions about fuel injectors for the 5.7 Hemi:
Q: How do I know if my fuel injectors are bad?
A: Common signs of bad fuel injectors include rough idling, poor fuel economy, misfires, and a noticeable decrease in engine performance. You might also smell fuel or see black smoke from the exhaust.
Q: Can I clean my fuel injectors instead of replacing them?
A: Yes, you can try cleaning your fuel injectors using a fuel injector cleaner additive or by sending them to a professional cleaning service. However, if the injectors are severely clogged or damaged, replacement is usually the best option. Cleaning can sometimes improve performance, but it’s not always a permanent solution.
Q: Do I need to replace all my fuel injectors at once?
A: It’s generally recommended to replace all the fuel injectors at the same time to ensure consistent performance and fuel delivery. Replacing only one or two injectors can lead to imbalances and uneven combustion.
Q: Will upgrading my fuel injectors increase horsepower?
A: Upgrading to higher-flow fuel injectors can increase horsepower, especially if you’ve made other performance modifications to your engine. However, you’ll need to ensure that the fuel injectors are properly matched to your engine’s needs and that you have the correct ECU tuning to take advantage of the increased fuel flow.
Q: Where can I buy fuel injectors for my 5.7 Hemi?
A: You can buy fuel injectors from various sources, including online retailers like Amazon, auto parts stores, and performance shops. Make sure to buy from a reputable source to ensure you’re getting genuine, high-quality injectors.
Conclusion
Choosing the best fuel injectors for your 5.7 Hemi really depends on what you’re trying to achieve. For a simple replacement, OEM or Delphi injectors are a solid choice. If you’re craving more power and have some engine mods, the Bosch injectors are the way to go. And for a great all-around upgrade, the Fuel Injector Connection injectors offer a nice balance of performance and reliability. Whatever you choose, make sure they’re properly installed and tuned for the best results. Happy wrenching!
This site contains affiliate links. As an Amazon Associate, I earn from qualifying purchases. This means if you click on a link and buy a product, we may receive a small commission at no extra cost to you.
