Basket is empty!
123 Electronic Distributor-4 Cylinder  Tune it yourself image #1
Distributors - 123 Electronic

123 Electronic Distributor-4 Cylinder Tune it yourself

Part Number: 030.817
£364.28 inc. VAT On order
This product is not eligible for free UK delivery.
Please enter your name
Please enter a valid email address

This distributor is designed for connecting to a computer to enable you to adapt the advanced curve to suit your own requirements. Suitable for both 6 and 12 volt electrical systems, positive or negative earth. This unit will work both clockwise and anti-clockwise. It offers two sets of centrifugal advance curves (500 to 8000 rpm) that can be selected by placing a voltage on a wire from the distributor. (Handy, if you're driving on two different fuels, like regular fuel with LPG). Variable dwell. Spark-balancing, vacuum-advance and boost-retard, MAP-start field, rev. limiter. Ideal for working on a rolling road, Electronic dashboard. Everything you need! This is 123 part reference 123/TUNE-4-RV-G


We offer a setup service that will set up your 123 distributor to work perfectly with your specific car. If you are interested in this service please see part number 030.825.



Technical images

Order online

It’s easy to buy our products online! Find the product you want via the departments which can be found on the top banner, or the search facility if you know our part number/ Lucas number, or keyword. Please remember to add the forward-slash and not to put in any spaces in between the letters and numbers. e.g CG/085.002. If the product still can't be found try removing the code in front of the forward slash. e.g. 085.002.

To buy a product, click on the `Add to Basket` button on the individual product page.

You will then be taken to your own personal `Shopping Basket`, which gives you a running total of the goods you are planning to purchase. You can either continue shopping or `Proceed To Checkout`. Your Shopping Basket is also viewed on the right hand side of every page showing the quantity and cost of your order including postage. Email if you require any help.

Order by phone

Please call +44 (0) 1885 488 488 between 9 and 5 (UK time) Monday to Friday to speak to one our sales team.

Visit our shop: 

We also have a shop at Bromyard, so if you live nearby, or are in the area please call.

Holden Vintage & Classic, Linton Trading Estate, Bromyard, Herefordshire, HR7 7QT, United Kingdom

Open 9.00am and 5.00pm Monday to Friday. We are closed Bank Holidays.


Delivery charges are based on the value and weight of your order and your location. 

Your available delivery options will always be shown to you at the checkout. 

More information about our delivery methods can be found here

At Holden Vintage & Classic, we want you to be delighted with your purchase.

For this reason, if a product is faulty or defective, you may return it to us with a covering letter explaining the problem within 12 months of the date of purchase. We will send you a returns label to send the item back at our cost, and upon receipt of the returned goods, we will repair the product for you or send you a replacement.

If you've had a change of heart, you may return most new unused or unopened items, within 14 days of receipt for a full refund. The items must be in an as-new, resaleable condition. 
A copy of the sales invoice must accompany all returned goods. Sadly we do not refund postage costs unless the products are incorrect or faulty.

If you're unsure of anything, give us a call Monday to Friday 9am to 5pm, on +44 (0) 1885 488 488. 

Read more about returns here.