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PaulAA

Spark plugs for the six-pot

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NGK BP6ES seem to be the normal go-to. Personally I like the 3 prong (or now easier-to-find 4 prong) Bosch ones - the Triumph engines love them.  W7DTC are the non-resistive 3 prong ones or WR7DTC for the resistive.

These may be hard to find now, esp. the non-resistive.  The number of prongs is probably largely irrelevant (though extends life), it's being a side-electrode design with the spark exposed to the chamber that I think makes them work better.

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I'm with Nick and Alan on this, triumph engines love the multi-prong plugs!

I stocked up on these the other year, so as to have a decent supply, eBay is your friend for these (this is who I used previously, they sell in other quantities as well)

https://rover.ebay.com/rover/0/0/0?mpre=https%3A%2F%2Fwww.ebay.co.uk%2Fulk%2Fitm%2F232610894050

Cheers,

Phil

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