"I changed my old NGK plugs at 66k miles with these, and they transformed the performance of my car (Rover 25 1.4). It idles smoother, and the power delivery is seamless, plus it's using less fuel now."... (read full reviews)
"These Bosch spark plugs are recommended by Mercedes for my CLK 200. The factory set electrode gap was spot on, my Car is running better and more Economical....Well Done Halfords !!!!!"... (read full reviews)
"Brilliant plugs, easier starting with smooth throttle response. I have notice a slight increase in fuel economy and a dramatic increase in power.
I will be sticking these in all my future cars!!!!"... (read full reviews)
"Champion plugs used to be the market leader until NGK came along with there super reliable and superior performance , plus far cheaper range of plugs.Champion are now catching up but feel they still"... (read full reviews)
"This product offers great value for money. This is the second time I have purchased this product and can not complain about them at all. They were easy to change and have found that the engine is now"... (read full reviews)
"Brought these for my 1.7 1998 Ford Puma (on trade) and they seem to have made a difference. Its a sporty engine and the throttle response is crisper and starting seems smoother. I am yet to see if"... (read full reviews)
"My garage told me these don't last long so it'll be interesting to see if that's true or if they just wanted me to buy their ones! So far so good - they are spark plugs, they fit, and the car still"... (read full reviews)
"Very good indeed has improved lower end pickup & fuel consumption. I now get around 46mpg!
Before fitting these I was getting around 42mpg. However, they do seem to lose their 'spark' (wear out"... (read full reviews)