Your customer service is excellent and your products are top quality!
S-300 External Shunt
FAA Approved Accessory
- PMA’d
- 300 Amp
- 3.25″ (W) x 1.75″ (D) x 1.75″ (H)
- 11.5 Oz Unit
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Product Overview
Prices
Retail Prices
Package includes:
- S-300 Shunt
- Installation Instructions
Description
Package
Retail Price
S-300 External 300 Amp Shunt
S-300
$60

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Testimonials
Customer Testimonials
Always very friendly and knowledgeable staff. Over time, I have purchased six different EI instruments for the two planes I own. The instruments are easy to install, very accurate, and dependable. EI has very stable and easy-to-operate instruments.
We have other EI products currently and have always been satisfied.
Easy to install, and the CGR was set up to my aircraft’s exact specifications.
EI’s products are the only ones we recommend to our customers.
- Customer
Hugo T. from Florida
- Aircraft
Cessna 177B
- EI Instrument
Installed digital volt/amp gauge in PA 28-181. Great unit easy to install. Much better than original.
Staff appears to be very helpful when assistance is needed in verifying information. Heard good things about it [EI] from personal known aircraft owners.
- Customer
Zarick J. from Florida
- Aircraft
Mooney M20J 201
- EI Instrument
Great product at a great price …. (and) reliability.
Excellent Service. Superb Product.
- Customer
Steven N. from Colorado
- Aircraft
Cessna 182E Skylane
- EI Instrument
Your products always work great! Great customer service and a quality product that we have used for years.
- Customer
Brenton C. from Tennessee
- Aircraft
Cessna 172M
- EI Instrument
I have worked with your products before and I like them.
- Customer
David K. from New Mexico
- Aircraft
Cessna T20N Turbo Centurion II
- EI Instrument
. . . the kit looks very well built and the company I fly for . . . has had a very good experience with your products and your customer support.