Mail-In Injector Service. Direct Injection & Port Injectors. Flow Tested. Cleaned. Documented.

Professional fuel injector cleaning, flow testing, and servicing for performance builds, daily drivers, race cars, and repair shops — anywhere in the country. We service both direct injection and port fuel injectors, and sell Fuel Injector Clinic and OEM replacement injectors.

Ship your set from any state. Every set comes back with before-and-after flow data.

$139 flatPort injection, set of 4, 6 or 8 · 24-hour turnaround · direct injection quoted by set · + $15 USPS Priority return shipping
  • Restore Lost Flow
  • Correct Spray Pattern
  • Matched Across The Set
  • Before & After Flow Data
  • Direct Injection & Port Injector Service
  • Nationwide Mail-In Service
CleaningUltrasonic bath, wear parts replaced as needed
Flow TestingMeasured, matched & documented
Injector SalesFuel Injector Clinic & OEM replacements
Mail-In ServiceShip your set from any state
Expert SupportServiced by the shop that tunes on them

Professional Injector Cleaning & Testing

Dirty, clogged, or uneven injectors can cause misfires, rough idle, lean cylinders, poor fuel economy, and inconsistent power. We clean, test, and inspect your injectors so you know exactly how they perform before they go back in the vehicle.

Our service includes ultrasonic cleaning, flow testing, spray pattern inspection, and flow matching across the set when possible. You receive data showing how the injectors performed before and after service.

$139 flat for a set of 4, 6 or 8 — one price, no per-injector math, no surprises when the invoice comes.

Direct Injection Injectors

Direct injection injectors operate under extreme pressure and need proper cleaning and testing to confirm they are flowing correctly. We service DI injectors for many late-model gas engines, including GM, Ford, and other performance applications.

Port Injectors

We also clean and test standard port-style fuel injectors used in LS, LT, import, domestic, and aftermarket EFI setups. Whether you are chasing a drivability issue or freshening up a build, we can help verify your injectors are ready.

How It Works

  1. Ship your injectors to us.
  2. We inspect, clean, and test them.
  3. You receive before-and-after flow data.
  4. Your cleaned injectors are returned ready to install.

Mail-In Service

We take mail-in work from anywhere in the country. Port injection sets are $139 flat for 4, 6 or 8, plus $15 flat USPS Priority return shipping (express shipping available on request); direct injection sets involve more labor and are quoted by set — text us before shipping. Turnaround is 24 hours — your set ships back the next business day after it arrives. Once your set arrives we clean, test, and contact you with the results before sending it back — so nothing goes back in your engine until you have seen how it flows. If an injector arrives stuck or heavily fouled and needs extended service, we contact you with a revised quote before doing any additional work.

What To Include & Where To Send

Pack the set well with padding. Include your name, phone number, return address, and the vehicle or engine the injectors came off. If you know your fuel type and horsepower goal, tell us that too — it helps if you end up needing a larger set.

Ship to: Pro Fuel Injector, 1285 N. Fitzgerald Ave, Ste. I, Rialto, CA 92376. Text or call us at 909-566-7586 when your set is on the way.

Need New Injectors?

We sell Fuel Injector Clinic injectors for performance builds, boosted applications, E85 setups, and custom tuning projects. We can also source OEM-style replacement injectors when your factory injectors are damaged, failing, or not worth servicing.

If you are not sure what size injector you need, contact us with your engine setup, fuel type, horsepower goal, and ECU system.

Text Us To Order Injectors Call 909-566-7586
Six performance fuel injectors in a row
Trusted Equipment & Brands ASNUFuel Injector ClinicHP Tuners

Ready To Get Your Injectors Tested?

Port injection sets are $139 flat for 4, 6 or 8 plus $15 USPS Priority return shipping — direct injection quoted by set — with 24-hour turnaround and before-and-after flow data on every set. Ship yours today, or contact us to order Fuel Injector Clinic or OEM injectors for your setup. We service customers nationwide from our shop in Rialto, California.