Hi everybody,

Im trying to source a set of non resistor Bosch H7DCO spark plugs.
Anybody know where i can buy these from as the dealer now only sells the resistor type.

Many thanks

Most guys go to NGK replacement...

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A Dalton

Im after the non resistor type...
Do NGK do this?
Ideally i'd like Bosch

BP6EFS..

Way better plugs than Bosch..

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A Dalton

Thanks Arthur. are these correct fitment for a 190E 2.5-16?

year?

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A Dalton

1990...16v version

I assume you mean 2.6 /103.942 engine..

Bosch replacement is HR9DC, so the NGK as stated will replace the original Bosch Non R H9DC plug.

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A Dalton

nope...its the 2.5-16v cosworth engine

Ok .... an EVO

I don't have a chart on it , but the BP6EFS NGK is the non resistor repalacement for the Bosch H7DC.. so , that is what guys are using unless you can find some Bosch NOS somewhere.

Sometimes NAPA still has them..but I prefer NGK since Bosch started making plugs in India..........
You may want to try the serch feature in the Performance forum..they will tell you what they like the best..or even MBDOC will know ..he raced one.

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A Dalton

No its a standard 2.5-16V :-)
I really appreciate the help...
The original plug for this car was the H7DCO...

Ok
NGK /BP6EFS is the replacement for that. [ H7DCO]
..but, if you are want a higher heat with a H9DCO, you want the NGK BP5EFS.
Be aware that Bosch heat increases with the higher # , whereas NGK decreases heat as the # increases..

Your stock plug is the one I first mentioned ..BP6EFS on NGK.


http://www.spark-plugs.co.uk/pages/technical/boschd6b-w4e2.htm

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A Dalton

Many thanks Arthur...So in essence the NGK /BP6EFS is the one i want?

Yes, If you want OEM heat range ..
if high mileage or in-town driving, you can bump it to the 5 , but that is just something that is owner preference.

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A Dalton

Please can you elaborate on the heat range thing...Im very Interested