Tach fits my panel nicely, was easy to install.
A-104 Adapter Plate
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Product Overview
Prices
Retail Prices
Included:
A-104 TR-1 Adapter
Description
Package
Retail Price
A-104 Adapter Plate
A-104
$128
Lead Time: Usually ships within 2–3 business days.

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Customer Testimonials
Pleasure supporting folks with like values.
We liked the price and the reputation of your company.
- Customer
Roy C. From Kentucky
- Aircraft
Piper PA-28-235 Cherokee Pathfinder
- EI Instrument
Working with EI representatives from the OSHKOSH show and sales representative has been a pleasant and positive experience. They have been very helpful, truthful and knowledgeable about EI’s products. I have yet to see the MVP-50P in action in our plane. Waiting for the Top Overhaul to be completed. We are glad we secured your product at the airshow. We had no idea, that a few weeks later, we would need to have a Top Overhaul. What great timing! Having your engine monitor installed in our plane will hopefully help us keep it out of the shop for further engine repairs.
- Customer
Phillip B. from Oklahoma
- Aircraft
Cessna 210N Centurion / Turbo Centurion
- EI Instrument
So far, great product
- Customer
Stephen L. from New York
- Aircraft
Cessna 172L
- EI Instrument
Always built well. Always dependable. Been using & relying on EI equip for over 35 years!
The equipment is fantastic, very intuitive, and easy to use.
- Customer
Gregory S. From Brazil
- Aircraft
Air Tractor AT-502A
- EI Instrument
Just about to begin flying with the EI MVP-50P, so no in-flight feedback yet. But I did study the user manual, then sat in my plane going through the screens, menus, etc. It was very easy and intuitive to locate everything, so I’m confident that it will become second nature to do this in flight… Very happy with all interactions with EI.
- Customer
Robert B. from California
- Aircraft
2002 Diamond DA40-180
- EI Instrument
You folks do a great job. Keep up the good work.
- Customer
Kevin D. from Missouri
- Aircraft
Cessna 172 Skyhawk
- EI Instrument
I have seen your products in other aircraft and have seen their reliability.
- Customer
Juan P. from British Columbia, Canada
- Aircraft
Cessna 172M Skyhawk
- EI Instrument
I have never had an issue with any EI products… it looks fantastic on the panel.
- Customer
Thomas A. from Oklahoma
- Aircraft
Beechcraft Bonanza E35
- EI Instrument
Works great, super install.