AAlways buy OEM(Original Equipment Manufacture). They will fit, function and last longer. There are plugs out there that are not made from the same materials as OEM. These are OEM.... Competitive Crosses: Bosch 7421, Bosch HR9LI33U, Champion 2103, Champion 2015, NGK TR4IX, NGK 7300, Autolite XP5245...Iridium is one of the hardest metals used in spark plugs today, which allows for smaller, more efficient electrode designs for improved cold starting and quicker acceleration Latest evolution in high-performance plug electrode material Improved cold-starting and acceleration characteristics Reduced ignition system voltage demands saves wear and tear New-vehicle applications using iridium plugs continues to increase Iridium tip for maximum resistance to spark erosion and corrosive combustion chamber environment One-piece integral suppressor seal meters spark plug energy to help provide long electrode life and seals against compression leakage Spark gap remains virtually unchanged during the life of the plug for increased fuel efficiency 12-month/12,000-Mile Limited Warranty ACDelco is an Original Equipment (OE) supplier and has the experience engineering and manufacturing components that achieve the highest quality standards required by vehicle manufacturers. FUNCTION:Uses a high-voltage spark from the ignition coil to ignite the air/fuel mixture inside the engine's cylinders.. SIGNS OF WEAR:Poor starting characteristics, decreased fuel economy, sluggish engine performance, excessive foiling or deposits on plug.. WHAT IT DOES:The Starting and Charging System starts the engine, maintains the battery's charge and provides power to the electrical accessories while the engine is running.
R**Z
Not genuine parts
These are not Genuine OEM ACDelco spark plugs, made my truck misfire on all 8 cyls. Do not buy these. BEWARE.
W**L
Received used spark plugs in new boxes
When I opened the pack of 8 Plugs and each one was covered in grease and oil. The outside of the box looked perfect and was sealed. My guess is another customer Bought and switched out their old plugs and then returned the old plugs pretending they were new. I think a better job inspecting returns is needed to make sure this doesn't happen. I ended up buying a set local and paying 2 times the price because I already had my truck tore apart and could not wait on new plugs. They did refund my money without any issues so thats a plus.
T**G
Very good product
Very well packaged and arrived as promised. Compared the new plug with the old plug that came out of the truck. It has identical identification numbers. OEM product for 2010 Chevy Silverado 1500
R**N
Potentially Counterfeit AC Delco Plugs
I purchased these spark plugs in December 2018. For period of 3+ months, they made a significant difference in my vehicle. Gradually, we started noticing sluggishness and even pinging. We changed to a higher octane gas and continued experiencing pinging. Yesterday, we decided to remove the plugs as we feared fouling. We then discovered that the 'new' plugs with less than 7K miles were INCREDIBLY worn. The 'Iridum' center electrode protrusion was rounded up to nearly the ceramic insulator base. Wear was about the same for all plugs. My vehicle performs very well with AC Delco products and unless their quality control or materials used to manufacture them are now substandard, these are not definitely AC Delco.
C**U
The real deal
All plugs came individually boxed, gapped right, and this is not a knock off real deal ac delco
L**A
Make sure you gap them according to your vehicle specs
I had bosch platinum wich are no good for my truck it gave me a ramdom misfire code, so I'd changed them to these ac delco iridium and i had to gap them to .060 according to the specs for my truck 2002 Chevrolet suburban 1500 LT 2wd with a 5.3L vortec, and they worked perfectly fine, they took the code away and paid half the price of what they wanted at the autostore, definitely recommended
N**N
JUNK
Garbage. Truck developed a miss shortly after installing these plugs. New wires were installed at time plugs were changed too. Put new coil packs on. Still a misfire. Finally pulled a plug to find this JUNK! 7 of the 8 the electrode is completely gone. Did not gap as I've been told you can chip iridium plating off. They all measured very close to the recommended .040 anyhow. These plugs have less than 4000 miles on them. No response from the seller thus far.
J**.
Great price for factory replacement plugs
Exact replacement for the factory plugs on my 2010 Silverado with 5.3 even through Amazon says it isn't. Best price I saw anywhere else and on top of that, GM has rebates on AC Delco spark plugs right now. After rebates, it's only gonna cost me $80 to install iridium plugs and upgraded Delco wires on 2 trucks.
Trustpilot
4 days ago
2 weeks ago