1. How much is the shipping cost?

Shipping rates are:
$7.95 for standard ground shipping to all US addresses including Hawaii, Alaska, Puerto Rico and Virgin Islands
$12.50 for expedited shipping to all US addresses including Hawaii, Alaska, Puerto Rico and Virgin Islands
$25.00 for US FedEx 2-day shipping
$45.00 for US FedEx Next-day delivery
$60.00 for US FedEx Next-day Saturday delivery (only available before 2pm Pacific time on Friday)
$41.50 for International DHL or EMS delivery to Canada
$55.00 for International DHL or EMS delivery to Europe and most other countries
$59.95 for International DHL or EMS delivery to Australia and New Zealand
**Email us for an International shipping quote via FedEx for faster delivery time.
**Shipping prices are estimates and subject to change at any time

2. Once I place my order, how long will it take to get my package?

Average delivery times are:
Standard ground Shipping: 3-5 business days
International: 4-9 business days
International FedEx can be faster but will cost more
Delivery times are estimates and subject to external conditions such as weather and natural disasters.

3. Does my new set of FiveoMotorsport injectors have a warranty?

Please click here to see our warranty policy.

4. Does FIVEO match competitor prices?

Please contact us with the part you're interested in and include a link to the competitor price. We will respond as soon as possible.


1. Do my fuel injectors come with new O-rings?

Yes, all of our fuel injectors will include the proper, brand-new Viton O-rings and/or seals for installation. We also include a tube of synthetic lube for proper installation with all new sets of injectors.

2. Can I install higher flowing fuel injectors in my stock or nearly-stock engine to add horsepower?

The answer is yes. But, only if you do it right.
If you install a high-flow fuel injector even a set that only flows 10-15% over stock, you risk over-fueling the engine. The result is fouled spark plugs, erratic idle, power surging and even permanent damage to the catalytic converter and your engine. Installing higher flowing fuel injectors alone will not increase horsepower.

On the other-hand if you are willing to spend the extra money to do it right, keep reading.
Fiveomotorsport offers Stage 1 fuel injector upgrades for over 300 different engine applications. If you don't see what you are looking for on our website, call or email us. Our technicians will help you make the correct choice for your application based on your specific engine parameters. The basic steps include the following:

  • Buy the Stage 1 fuel injector set listed for your stock engine.
  • Take the fuel injectors uninstalled with your vehicle to a professional tuner.
  • The pro tuner can install the new fuel injectors and retune and reset the timing on your engine using the stock reprogrammed controller.
  • This will increase horsepower and torque.

Example power increase: 120ft/lbs torque and 80 horsepower on a 6 cylinder 3.5 liter Eco-boost Ford F150. That’s money wisely spent for newly added horsepower and torque! Compare this to money spent on exhaust and headers just to add 30 horsepower!

3. What is an injector's static flow-rate and dynamic flow-rate?

In general, dynamic means energetic, capable of action and/or change, or forceful, while static means stationary or fixed. Static flow-rate is the injector flowing in a wide open position and referred to as 100% duty cycle.

When a fuel injector is tested at a specific pressure and the injector's internal mechanism is held open allowing fuel (or in this case testing fluid) to flow at a constant rate, we then measure the amount of testing fluid and this is the static flow-rate. Flow rates are most commonly measured metrically in cubic centimeters per min shown as cc/min, and in the US as pounds per hour shown as lbs/hr. The most common pressure applied to a fuel system or an injector test-bench when conducting these tests is 3 BAR or 43.5 psi.

Dynamic flow rates are measured when the fuel injector is in action--opening and closing at specified intervals under pressure. On the injector test bench parameters such as engine RPM, voltage and injector open and close rate measured in milliseconds or ms can be simulated. These dynamic test results give us a more complete and accurate example of how a specific fuel injector will function in a real-life situation when operating in the engine. All of our custom, flow matched fuel injector sets are tested both statically and dynamically for true results that will improve your performance.

4. What type of fuel injectors are right for my application?

Learn more about your fuel injector options. By clicking this link you can learn about the different types of fuel injectors we offer to our customers.

5. How do I know if my current injectors are low impedance or high impedance?

By measuring the resistance across the two electrical terminals of the injector with a multimeter, you can determine the impedance. If the resistance is between 1.5 and 4.0 Ohms, you have low impedance injectors (Low Z). If the resistance is between 8 and 16 Ohms, you have high impedance injectors (High Z).