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Addition to plug queries

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Addition to plug queries
Tiger Offline
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Joined: Apr 2018 Posts: 506 Threads: 129
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Location: Staffordshire
Car type: Ruby mk 2
#1
08-11-2022, 06:59 PM
Just noticed on Jamie’s site the 2 plugs listed appear to have different base shape?
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Reckless Rat Offline
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Joined: Aug 2017 Posts: 2,251 Threads: 33
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Location: Deepest Frogland 30960
Car type: 1933 RP Standard Saloon
#2
08-11-2022, 07:16 PM (This post was last modified: 08-11-2022, 07:20 PM by Reckless Rat.)
One is threaded 18mm diameter and the other one is threaded 14mm diameter. The 18mm plugs are for the low compression head and the 14mm for the late Ruby high compression head. They are not interchangeable.

Both these plugs have a flat machined base and should suit your car. (unless it has been modified by someone)
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