A conservative rule of thumb: injector cc/min ÷ 10.5 ≈ max HP on gasoline at 80% duty cycle. For E85, multiply by roughly 1.3× (E85 requires ~30% more fuel by volume). Always size slightly larger than your peak goal to keep duty cycle below 80% and leave headroom for tuning. Contact us and we'll help you select the right size for your specific build.

FIC injectors use an EV6 (USCAR) body on all sizes except the 2150cc which uses EV14. If your factory harness uses EV1 connectors (LS1/LS6, Gen III trucks) or Multec 2 connectors (Gen III trucks), you will need a pigtail adapter set. LS2, LS3, LS7, LSA, and Gen IV trucks have factory EV6 connectors and are direct-fit for all sizes except 2150cc. The configurator above auto-detects this for you.

Yes. All FIC injectors are fully compatible with gasoline, E85, and flex-fuel applications. The internal components are stainless and the seals are ethanol-resistant. Note that E85 requires approximately 30% more fuel volume than gasoline, so you may need a larger injector size when running E85 full-time. Use the E85 sizing rule when calculating: (target HP × BSFC_E85) ÷ (8 injectors × 0.80 duty cycle).

Every FIC set includes individual flow-match data sheets for each injector, ECU calibration data (dead times, flow rates at multiple pressure points), and replacement O-rings. The FIC ECU Data Library on their website also has pre-built calibration tables for the most common tuning platforms including HP Tuners and Holley EFI — just select your part number.

Yes — Hi-Rev Dyno & Engine operates a full dynomometer facility in Rialto, CA. We can install, tune, and dyno-certify your injector swap on-site. Contact us to schedule a dyno session alongside your parts order. Bundling installation and tune with a dyno pull is the most efficient way to verify proper fueling and maximize your results.