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Originally Posted by Paul Grant
A word of warning. While I have no personal experience with the Bosch +4 Platinum plugs, it seems as though there is a rather large contingent of Dwebbers who have had trouble with them working well in Rover engines. Don't ask me why or how. Do a search on discoweb.org for Bosch plugs and you'll find more than a few threads.
PS I've had very good luck with NGK's.
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Paul, Tell him the whole story, you had bad luck using the Bosh plugs while running old factory wires or cheap replacements.
As mentioned before, a set of Bosh Platium Plus 4's with good wires will out torques a set of factory plugs with good wires.
I haven't had one person, who has used this combination of plugs and wires, not experience good results.
As far as that goes, Bosh will replace them for free or give you your money back if you aren't happy with them, show me anyone else that will put that in writing on their boxes.
Price wise, yes they are a little more expensive, around $6 apieceb ut they will pay for them selves easily in improved performance.
Mike