Product images and videos 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.
FAST
FAST LS91 High Output Universal External-Core Coil
SKU: F003 730-0891
Description
Part #: 730-0891
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.
Features:
- High-output E-core coils for race and street
- Up to 70% higher energy at the spark plug than stockfor maximum performance, race or street
- E-core design with closed magnetic path reduces leakage and improves energy transfer to the spark plug, for maximum ignition performance.
- Plastic overmolded core with improved urethane encapsulation material provides protection against severe shock, harsh vibration, and high voltage breakdown by eliminating the exposed E-core
- Insulated primary connector for enhanced safety with mating connector included
- Improved coil wire retention and longer creep path protects against high voltage arcing
- 50 state legal CARB E.O. D-225-60
The I91 Inductive Coil is designed for use with high output inductive systems such as the I6 or XR-3000
This product may expose you to chemicals known to the State of California to cause cancer, birth defects, or other reproductive harm.
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
Fitment Guaranteed
Don’t gamble
on fit.
Log your build in the MOTORMIA app and we’ll guarantee this part fits your exact setup — or your money back, return shipping covered.
Available on iOS & Android
Specifications
| Brand | FAST |
| Part Number | F003 730-0891 |
About MOTORMIA
Buy with Confidence
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.
View Full Return PolicyShipping
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.
Free shipping over $200 in the continental US. Alaska, Hawaii, U.S. territories (Puerto Rico, U.S. Virgin Islands, Guam, American Samoa, and the Northern Mariana Islands), and international orders carry surcharges — most appear at checkout. Some exceptions (LTL freight, or suppliers who quote freight only after we place the order) won’t. In those cases we’ll reach out with the exact charge before your order moves forward.
View Full Shipping Policy