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S-300 External Shunt
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Package includes:
- S-300 Shunt
- Installation Instructions
S-300 External 300 Amp Shunt
S-300
$60

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Customer Testimonials
This is the third EI instrument I am having installed in “Lillybelle .” I am impressed with the ease of operation, the affordability and the accuracy of each of these instruments. For years I trusted my life to 50+ year old gauges. Now I don’t have to. What a relief!
- Customer
- Aircraft
- EI Instrument
The older EI ultimate engine analyzer that came with my plane that I bought 7 years ago has always worked flawlessly.
Very impressed with the clarity and readability of the CGR-30P gauge.
- Customer
- Aircraft
- EI Instrument
Beautiful graphic display, easy to use, perfect automatic dimming!
- Customer
- Aircraft
- EI Instrument
Great tech support. Someone always answers and gives accurate concise information.
- Customer
- Aircraft
- EI Instrument
I won a FP-[5]L and had it installed in my c150. I was/am impressed with the accuracy and ease of operation of the FP. I wanted a new tach and I trust (and verified) that the EI R-1… would be my best choice. I am not a rich man. These instruments are affordable and incredibly accurate. Already planning my next buy from EI.
- Customer
- Aircraft
- EI Instrument
Have had EI instruments in my past plane and current plane and they always performed flawlessly.
- Customer
- Aircraft
- EI Instrument
Love the look and having every piece of info in front of me… Better price and look [versus competition].
Very easy to install. Harness is clearly marked. Instrument worked first time. The instrument is intuitive and easy to use.
- Customer
- Aircraft
- EI Instrument
Works Great! Love it!
[I chose EI because they offer a] certified replacement vs. back-up only and they look great.
- Customer
- Aircraft
- EI Instrument