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FAST LS91 High Output Universal External-Core Coil

SKU: FST730-0891

Ignition Coils

FST Ignition Coils...

FAST LS91 High Output Universal External-Core Coil

SKU: FST730-0891

Ignition Coils

FST Ignition Coils...

A$232.59
IN STOCK! Est Ship 3-7 Days days. In stock at 2 locations (more than 10 available)

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Description

Ignition Coil - LX91 - E-Core - 0.400 ohm - Male HEI - Epoxy Filled - 90 Degree Boot / Terminal Included - Black - Each

I91 Coil

The I91 Coil is designed for use with FAST high output inductive ignition systems such as the I6 Ignition Control or the XR700 and XR3000 Electronic Conversion Systems. The internal design is optimized to produce a long duration spark coupled with higher voltage output making it ideal for street and performance applications.

Additional Information

The I91 Inductive Coil is designed for use with high output inductive systems such as the I6 or XR-3000

Part Type

Ignition Coil

Data: v4.2 - Upd: 2026-11-08 07:47:02

Features

Images are supplied by the manufacturer and may be generic. While all efforts are made to provide accurate pictures, there may be differences in the actual product, such as colour, quantity, version, or included components. Please carefully review the description and specifications for details on inclusions or any variations. Some items may be sold individually or in sets, and images may occasionally depict additional products or quantities not included in your purchase. For assistance or clarification, please contact customer support.

Specifications

Product Downloads

# Document Type Download
1. Catalog

Installation guides, warranty details, and other supporting documents are provided by the supplier. In some cases, these files may originate from regions outside your locale, meaning instructions, warranty procedures, and images may not fully align with your specific vehicle or region (e.g., LHD vs. RHD differences, return policies, etc.). If you need clarification, please contact a StreetFX support agent.

Data: v2 - Desc: v4.2 - Upd: 2026-11-08 01:01:24

Reference Information

Reference Data (Provide these details to our support team)
Brand Name/s Fast, FAST ELECTRONICS
StreetFX SKU fst730-0891
SFX Item ID 4085041
Accounting SKU fst-730-0891
Manufacturer SKU 730-0891
Manufacturer UPC 021174021080
Alternative References 730-0891, FST-730-0891

Ignition Coil, I91, Inductive, Square, Epoxy, Black, Each

Need the highest possible spark energy and spark gap current? These FAST I91 inductive coils are just the ticket. They are the recommended coils for street use with FAST HI-6, Mallory Hyfire, and MSD 6 CD systems. They also work great with FST DMSI, HI-6S, and XR3000 inductive ignitions. They are not designed for race or extended high-rpm use with high-output ignitions, or for use with points.

Product Attributes
BrandFAST
Manufacturer's Part Number730-0891
Part TypeIgnition Coils
Product LineFAST I91 Inductive Ignition Coils
UPC021174021080
Coil StyleRemote mount
Primary Resistance0.400 ohms
Coil Internal ConstructionEpoxy
Coil Wire AttachmentMale/HEI
Coil ColorBlack
Maximum Voltage47,000 V
Turns Ratio57:1
Secondary Resistance4.60K ohms
Inductance4.70 mH
Peak Current380 mA
Spark Duration280 uS
Mounting Bracket IncludedYes
Coil Wire IncludedNo
Ballast Resistor IncludedNo
Coil ShapeSquare
Height (in.)3.000 in.
Length (in.)3.750 in.
Width (in.)2.500 in.
QuantitySold individually.
NotesCoil is universal. Modifications may be required.

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