Very affordable… great installation instructions. [I chose EI because of its] price point, certified primary.
- Customer
Benjamin T. from South Carolina
- Aircraft
Piper PA-28-181 Archer II
- EI Instrument
8am–4:30pm PST M–F
[mbhi location="Main"]
RC-1 Tach Drive Cap
RC-1 Tach Drive Cap
$4.95
Lead Time: Usually ships within 2–3 business days.

Very affordable… great installation instructions. [I chose EI because of its] price point, certified primary.
Great service for Electronics International. Very helpful with what it needed for my aircraft. My mechanic has installed several of these units and highly recommended this for my aircraft.
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.
Your guys were great at answering all my questions . . . .
Staff appears to be very helpful when assistance is needed in verifying information. Heard good things about it [EI] from personal known aircraft owners.
Awesome product. Fast easy installation.
Great… price [&] support
I really appreciate the quality of communication about my order. The instrument offers the right functionality (being a primary instrument) in the right form factor for my application.
Nice Instrument, all the electrical information I need in one place. [I chose EI for its] performance and price.
I have been flying with EI instruments for over 20 years. I purchased the CGR-30P to update my engine instruments into one modern package.
New Tachometer is amazing . . . Engine Performance analysis at a whole new level!
People [at EI] were great to work with.