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George L Perez
2025-09-03 15:24:34
No issues after over eight months of pretty hard driving(dead of winter to 90+ degree heat and 50-60% spirited driving when I do drive. I will tell you this it is IMPERATIVE that you let your hemi engine warm up always at least least a few minutes preferably at least five before driving especially if you're putting high performance parts like these and others on your engine. Use common sense make sure you use the dielectric grease to encourage a good spark and I also replaced the plugs with the Lazer iridiums and used anti seize on the plugs
Duke
2025-08-28 10:53:16
Changed my engine 100%. Way better gas mileage and engine runs smooth. Definitely recommend for HEMI owners.
Jim M.
2025-08-19 15:15:36
I have used Accel products since the 60's still the same great quality
Karen Eagle
2025-07-26 15:45:03
They are expensive, but just buy them. I installed these on a 2015 Jeep Grand Cherokee (4wd) with the V8 Hemi, and the effect was remarkable. The engine was already running smoothly, put these coil packs increased my mileage from 16 mpg to +24 mpg city/highway, with even smoother running and plenty of crisp acceleration. Remember to force the ECU to relearn the TPS and the Camshaft Sensor, which is just a push of a button with a good scanner.
Paul R.
2025-07-06 13:16:58
Great edition to my 2012 Jeep Grand Cherokee. Install was a breeze no issues at all Took about ½ hour to install. Fuel mileage has a slight improvement but the best result is the immediate power when engaging the throttle. So much better now.
Josh
2025-06-15 10:46:45
Love the power and mileage this has given my 5.7 Hemi. Smoother idle, less engine whine. I fell in love with my truck all over again. The yellow caps are great, gives the engine bay more depth and they’re eye catching. As for the install, you have to actually know what you’re doing. Tip: add a small dabble of dielectric grease in the end of the coil holes before installing.2006 Ram 1500 5.7 quadcab
leobardo rios
2025-06-01 12:47:50
Works. But didn't notice and improvement on fuel or power. My vehicle does feel a bit more shaking when idling.
Dave
2025-05-10 11:37:32
I could tell the difference immediately. It started faster and idled smoother. Definitely a bump in low end torque and horsepower. Perfect fitment on my 2014 challenger rt. Took about 90 minutes to get them all installed and they look great.
pedro
2025-03-14 13:21:39
I love the way it woke up my ride and made me love my ride all over
Customer
2025-01-08 12:19:58
Seem to work well
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