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Technical

21mm Diameter

21mm Diameter spark plugs from popular manufacturers including Denso, NGK, Champion and Bosch.

To find the right spark plug for your vehicle try our Spark Plug Finder

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About GSP
Green Spark Plug

Green Spark Plug Co. Ltd has now added a dedicated sales and distribution team to handle customers questions and pre-sales enquires, we are experts in our field so if you have a query let us know!

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Our 3 Customer Promises
1

Fast Delivery - Products in stock for same day dispatch. Cut off 1pm GMT. (Supply permitting)
* Applies to UK Mainland only

2

Est 1980 - Over one million spark plugs sold. Call us for technical advice
+44 (0) 1477 532 317

3

Shop With Confidence - Guaranteed low prices. 30 day no hassle returns.

Company Info

Call Us +44 (0) 1477 532 317
(9-5 Mon-Fri) GMT

Unit 2
King Street Trading Estate
Middlewich
Cheshire
CW10 9LF

sales@gsparkplug.com
custservice@gsparkplug.com

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