Bosch Spark Plug 4 Popular Q&A

Q: How much do a set of 'Bosch 4' spark plugs go for?
A: If these are platinum plugs, they sell for $18.99 a pair in Canada. I don't know what they would go for in the States, but I would think they are cheaper. Read More »

Q: Does bosch platinum 4 spark plugs work?
A: Always go with the stock spark plugs. they have the correct resistance and wont throw off your timing since the engine was designed to use them. They're cheaper... Read More »

Q: Why is the bosch platinum +4 spark plug threaded on the wire end?
A: Take them back to the store. Each box is supposed to have the end that screws onto those little threads, they prob fell out. And not that this is relevant to yo... Read More »

Q: Any problem in using Bosch 4 electrode spark plugs in 4.7 dodge D...
A: It was time to change my sparkplugs (almost 90K)I decided to try bosch +4 plug's # R3 385 or part # 4458. After installing the new plugs the engine (454 vortec)... Read More »

Q: Can you install bosch platinum 4 spark plugs in a mk4 gti vr6 24v...
A: The Bosch Platinum has a long list of vehicle makes it works with,... Read More »

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