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Just got them installed yesterday. Mated with a new rotor, distributor cap, and plug wires. My jeep runs so much better. Smooth throughout the powerband. No sputtering or hesitation in acceleration. I'm sure the Bosch plugs play a big part in the performance upgrade. Hope my gas mileage improves as well.
Verified purchase: Yes | Condition: New
these are good quality spark plugs @ much cheaper rate
Verified purchase: Yes | Condition: New
Verified purchase: Yes | Condition: New
Easy install on the 4.0 jeep, we will see what they are like in the 100,000 miles
Verified purchase: Yes | Condition: New
For a tuneup on my 1993 Jeep Cherokee 4.0 Runs a lot better.
Verified purchase: Yes | Condition: New
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