Choose a Store
- Shop All
- Replacement Parts
- Performance Parts
- Accessories
- Oil & Fluids
- Special Offers
- Advance Rewards
- Advice & How-Tos
- Project Guides
Share
Champion Iridium Spark Plug RER8ZWYCB4 - Maximum Performance & Longevity
7 yr replacement if defective
How Would You Like To Get This Item?
Store Pickup
Same Day Home Delivery
Home Delivery
Product Information
Product Details
Part No. 9407
Warranty Details (7 YR REPLACEMENT IF DEFECTIVE)
Champion Iridium spark plugs combine a fine-wire iridium center with platinum ground electrodes to help any engine achieve top performance, regardless of ignition type. This advanced design ensures precise ignition, long-lasting durability and reliable performance mile after mile, while reducing wear and tear. Champion your engine with spark plugs engineered to improve efficiency and keep your vehicle running at its best.
Product Features:
Product Features:
- IRIDIUM FOR MAXIMUM LIFE -- Iridium center electrode delivers long-term reliability and exceptional durability for consistent performance
- OE-QUALITY FIT -- Built to meet OE fit, form and function for dependable performance
- DEPENDABLE STARTS -- Engineered for reliable ignition in all weather conditions
- GREATER IGNITABILITY -- Fine-wire center electrode ensures faster, more efficient ignition
- SHARPER SPARK FOCUS -- Platinum-enhanced ground electrode promotes precise spark targeting for optimal combustion
- CONSISTENT PERFORMANCE -- Maintains stable operating temperature under all engine loads
- EASY TO INSTALL -- Pre-gapped design simplifies installation
- OPTIMAL TEMPERATURE CONTROL -- Premium alloy quickly reaches and sustains the correct operating temperature for reduced fouling
- CORROSION RESISTANCE -- Coated shell provides corrosion resistance in harsh environments
Specifications
Center Electrode Design:
Fine Wire
Center Electrode Diameter (Inch):
0.078 in
Center Electrode Tip Material:
Iridium
Electrical Terminal Type:
Non-Removable Nut
Gap Style:
J Gap
Grade Type:
Performance
Ground Electrode Core Material:
Nickel
Ground Electrode Material:
Nickel Copper Alloy
Ground Electrode Quantity:
1
Ground Electrode Tip Design:
J Gap
Ground Electrode Tip Material:
Iridium-Platinum
Hex Size:
0.625 in
Hex Type:
Hex
Indexed:
No
Installed Height (Inch):
1.99 in
Insulator Height:
0.08 in
Manufacturer Heat Range:
8
Part Description:
Spark Plug
Pre-Gap Size:
1.05 mm
Reach:
1.103 in
Resistor Type:
Yes
Seat Type:
Flat
Thread Diameter:
12.000 mm
Washer Type:
Crush
Washer(s) Included:
Yes
4.76 out of 5
220 Customer Reviews
93% of respondents would recommend this to a friend
Ratings Distribution
5 Stars
187
4 Stars
25
3 Stars
2
2 Stars
1
1 Star
5
Pros
2
Increases Power
1
Durable
1
Easy To Install
1
Improves Engine Efficiency
Cons
1
Non
Best Uses
2
Replacement
1
Everyday Driving
1
Performance Driving
Car & Truck
1
Auto Enthusiast
Describe Yourself
1
Casual Driver
Most Liked Positive Review
Best plug ever !!!
This is the best my BMW 530i has ever performed, With these Champion Iridiums.
Most Liked Negative Review
Iridium Champions in my 2012 Charger
I went to install these in my Charger for the 2nd time. The first time I just snugly tightened them. This 2nd time I tightened them to the specs stated and 4 of the 6 broke inside. It separated from the area where where the threads are to the head head around the plug.
Now keep in mind that the plugs worked well in my car before this 2nd change for 40K miles and were still good. Only changed due to a scheduled maintenance exchange. There is always the possibility that the torques specs were wrong, or Iridium isn't the strongest metal, or my torque wrench may not have worked properly.
Reviewed by 220 Customers
Best plug ever !!!
Staff Reviewer -
This is the best my BMW 530i has ever performed, With these Champion Iridiums.
Bottom Line Yes, I would recommend to a friend
not a good fit
After replacing the engine misfires, shakes, and loss of power. Checked again and found the plugs were loose. Tried to tighten them and they were very easy to unscrew back. You can never make them tight enough. Finally, find that plugs are not proper fit. They never stay tight. Put back the old NGK plugs and car runs fine.
Bottom Line No, I would not recommend to a friend
Big difference
Verified Buyer -
If you have a HEMI, this is what you must have
Bottom Line Yes, I would recommend to a friend
OEM replacement
Works as it should.
Bottom Line Yes, I would recommend to a friend
These last forever
Verified Buyer -
Used these to replace this exact brand and number spark plug in my Jeep after 140,000 miles/ 8 years. Car was still running smoothly, no misfires and plugs still looked fine, but gap has increased a little. I'd swear by them.
Displaying Reviews 1 - 5Back to Top
No results
Feedback
Be The First To Know About Deals And Promotions.
Plus, create an account to receive $5 off of $20 or more.
TOP REPLACEMENT PARTS
ROUTINE MAINTENANCE PARTS
CUSTOMER SUPPORT
ABOUT US
PROFESSIONAL SHOPS