Air and Fuel› Fuel Injection Systems and Components - Electronic

Katech

540cc High Impedance Fuel Injectors

$749.99

SKU: FIC-IS303-0540H

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Special Order
Ships in 4–6 weeks
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$100 Minimum Order
30 Days Return
INSTALL DIFFICULTY
DIY PRO SHOP

Moderate — 2–4 hours

Overview

The Fuel Injector Clinic IS303-0540H is a set of 8 high-impedance injectors. These injectors have a flow rate of 540cc per minute (60 lbs/hr) at 58 PSI fuel pressure.

Designed for specific GM LS engines, including LS3, LS7, LSA, L76, L92, and L99 applications, they offer great linearity and short pulse width repeatability. Each injector is precisely flow matched to within 1% and individually numbered, with detailed results provided on an included flow sheet.
Show original supplier description
The Fuel Injector Clinic IS303-0540H injector set includes eight high-impedance injectors, each capable of flowing 540cc per minute or 60 lbs/hr at the standard 58 PSI fuel pressure. Designed for a direct, plug-and-play fitment in popular GM LS engine platforms, this set is compatible with LS3, LS7, LSA, L76, L92, and L99 engines. Fuel Injector Clinic meticulously flow-matches each injector within the set to within 1% of each other, with individual serial numbers and detailed flow sheets included for verification. The injectors are rated at 43.5psi (3Bar) and 90 degrees F using CF-16B calibration fluid, and they come with all necessary o-rings for factory application fitment. These injectors are covered by a lifetime warranty against failure due to manufacturing defects. Plug and Play GM ECU data is available to facilitate tuning and ensure optimal performance for your specific application.

Product descriptions are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.

Fitment

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Specifications

BrandKatech
Part NumberFIC-IS303-0540H
CategoryAir and Fuel
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Returns & Fitment

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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Shipping

Orders are processed in 1–3 business days. In stock parts ship promptly from our partner network. Special-order items either aren’t currently stocked or are built to your spec — expect 4–6 weeks. If a part goes on backorder while your order is in the queue, we’ll reach out and work through discounted alternatives together.

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