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Autolite Copper Resistor Spark Plug: Quick Starts & Enhanced Durability

(851 reviews)
Part # 4302
2 year warranty
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Product Information

Product Details
Part No. 4302
Warranty Details (2 Year Warranty)
Autolite Copper spark plugs are expertly crafted to ensure quick starts and reliable performance for your vehicle or application. Featuring a copper core center electrode, these plugs excel in thermal control and resist fouling, ensuring consistent operation. The high nickel alloy center and ground electrodes are designed for extended life, while the high alumina multi-rib ceramic insulator enhances thermal conductivity and provides superior insulation for added strength. With a nickel-plated shell, these spark plugs resist corrosion, offering long-lasting durability. Engineered with a standard center electrode design and short projection, they deliver optimal compatibility and efficiency. The nickel tip material on both the center and ground electrodes ensures reliable performance, while the resistor type construction minimizes electrical interference. Designed to optimize fuel economy, these spark plugs help you maximize every gallon of gas, making them a cost-effective choice for regular-grade applications.

Product Features:
  • The copper core center electrode aids in thermal control and improves resistance to fouling.
  • Its specially engineered high nickel alloy center and ground electrode provides extended life.
  • The high alumina multi-rib ceramic insulator provides thermal conductivity and superior insulation for increased strength.
  • Designed with a nickel-plated shell that is corrosion resistant to provide increased durability for extended periods.
  • Good Fuel Economy: Designed to optimize fuel efficiency, these spark plugs help you get the most out of every gallon of gas.
Specifications
Center Electrode Core Material:
Copper

Center Electrode Design:
Standard

Center Electrode Projection:
Short Projection

Center Electrode Tip Material:
Nickel

Electrical Terminal Type:
Removable Nut

Electrode Tip Material:
Resistor

Grade Type:
Regular

Ground Electrode Core Material:
Nickel

Ground Electrode Quantity:
1

Ground Electrode Tip Design:
Standard

Ground Electrode Tip Material:
Nickel

Hex Size:
5/8 in

Hex Type:
Hex

Indexed:
No

Insulator Material:
Ceramic

Manufacturer Heat Range:
15

Pre-Gap Size:
0.03 in

Reach:
0.75 in

Resistor:
Suppressor

Resistor Type:
Yes

Seat Type:
Flat

Skirt:
Yes

Thread Diameter:
10 mm

Tip Configuration:
Standard

Washer(s) Included:
Yes

Wrench Diameter:
5/8 in
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4.67 out of 5
851 Customer Reviews
91% of respondents would recommend this to a friend
Ratings Distribution
5 Stars
690
4 Stars
103
3 Stars
24
2 Stars
3
1 Star
31
These work well on a Honda VT1100T ACE Tourer moRecommend highly for Mercury 90 Outboard.69 RS SS Camaro yes I will buy this product again and recomm
Was correct part.NoGreat priceGreat plug for Harley Twin Cam enginesWork great in my jet boat!
Pros
55
Easy To Install
53
Improves Engine Efficiency
44
Durable
38
Increases Power
17
Lightweight
Cons
7
none
2
Difficult To Install
2
None
1
Decreases Gas Mileage
1
No Improvement In Performance
Best Uses
56
Replacement
54
Everyday Driving
18
Restoration
11
Performance Driving
6
Racing
Car & Truck
11
Casual Driver
8
Auto Enthusiast
8
Mechanic
3
Truck Enthusiast
1
Competitive Driver
Describe Yourself
28
Casual Driver
23
Auto Enthusiast
19
Mechanic
9
Truck Enthusiast
4
Competitive Driver
Most Liked Positive Review
Best plug for your Neon
These plugs do the job for stock or performance. Somebody gave them a bad rating because they 'only' lasted 40,000 miles. You are supposed to change them at 30,000 miles so that is actually a positive review. Change the stars to 5. You can't beat them for a street driven Neon.
Most Liked Negative Review
does not match NGK CPR7EA-9
This does not match the NGK CPR7EA-9 Spark plug. The tip is extended on the NGK. This Autolite has a recessed tip. Thus not getting the spark into the cylinder head as designed by the manufacture. Was being used on a Kawasaki Valcan 900.
Reviewed by 851 Customers
"Exact fit" doesn't really mean exact fi
Staff Reviewer -
Not good product
Bottom Line No, I would not recommend to a friend
Great!
Staff Reviewer -
I bought these for my motorcycle. It was cutting out real bad and after replacing the plugs, it runs great now!
Bottom Line Yes, I would recommend to a friend
decent
Staff Reviewer -
you get what you pay for. next time i am going to buy the premium spark plugs. my engine starts up a bit faster in the morning now though
Bottom Line Yes, I would recommend to a friend
Recommend highly for Mercury 90 Outboard.
Verified Buyer -
I started using these in my 2001 Mercury 90 hp outboard a few years back. The engine runs smoother and I have had less fouling of the spark plugs. Great price thru Advance Automator!
Great for Ford N-Series tractors
Staff Reviewer -
This plug works great in my 1945 Ford 2n tractor. I put a fresh set in every 4-5 years and they usually look like they don't really need replacement. But for the price is good preventative maintenance.
Bottom Line Yes, I would recommend to a friend
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