BOSCH 4459 HGR9DQP Platinum+4 Spark Plug - Single

So far so good. I put these in my 2001 Ford Expedition and had a huge increase in power and the engine runs much smoother. My old plugs were some of the worst I've seen so any new plugs would have made a difference but thse seem to work very well. Just remember not to over tighten which is the leading cause of plugs blowing out on these fords.

Works Great with our 1999 Ford expedition 4X4{we had the typical bad manufacturer sparks} truck runs Way better and they are well made.

After install ..motor ran rough and Sharkey not bad when you drive plenty of power but , sitting at light or warming up I think the four prongs are hindering the spark in some way like an arching effect in the cylinder not a straight forward fire will replace with ac delco.

I purchased these as an upgrade for my Expedition's tune up. They are great, high quality plugs that improved start-up, power, and gas mileage. The price was less than 1/2 of any prices I could find in the auto parts stores. The plugs are build solid and there's no concern that these will separate into two pieces like the old plugs did.

Or if these items for my ex wife’s car at work further than

They worked great initially but after about 4 weeks the van started to misfire. Went through the whole troubleshooting process and even did the spark test with the leads and spark plug to test for spark. Turns out one of the electrodes was broken and would misfire under pressure. We only noticed when we got the results from the scan tool and decided to further investigate the lead and plug on the specific cylinder. I replaced them with iridium plug. I'm not sure what cause the break so I'm gonna give three stars.

Replaced the original spark plugs with these in 2006 Ford Focus ZX4. Dramatic improvement in performance and sound, probably to some extend due to the old ones being in pretty bad shape after 11 years and 70 K miles. This car is driven only in town, no highway.

Nice deal and plugs make car run better, what more do I need to say, right? I loved the fact these products arrive quicker than my local auto parts dealer can get them!