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Autolite Double Platinum Spark Plug: Enhanced Durability & Performance
5 year warranty
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Product Information
Product Details
Part No. APP25
Warranty Details (5 Year Warranty)
The Double Platinum Spark Plug is engineered for exceptional durability and performance, making it a top choice for distributor-less ignition system (DIS) engines. Featuring a platinum-to-platinum design, it minimizes gap erosion and reduces misfires, ensuring a longer service life compared to copper and standard platinum plugs. Its yttrium-enhanced ground electrode delivers superior heat transfer, allowing it to withstand high temperatures and pressures for extended durability. The high alumina ceramic insulator optimizes thermal conductivity and dielectric strength, while the multi-rib insulator prevents flash-over for reliable operation. With a mid-projection center electrode and tapered seat type, this performance-grade spark plug is designed to deliver consistent ignition and efficiency. Both the center and ground electrode tips are crafted from platinum, ensuring robust functionality and reliability. Ideal for drivers seeking enhanced engine performance and longevity, this spark plug is built to meet the demands of modern engines.
Product Features:
Product Features:
- Engineered with a platinum-to-platinum design that prevents gap erosion, extending the life of the spark plug.
- The yttrium-Enhanced Ground Electrode delivers superior heat transfer that delivers more durability under high temps and pressure for greater life.
- Its high alumina ceramic insulator provides optimum thermal conductivity and dielectric strength.
- The multi-rib insulator prevents flash-over.
- Designed with a mid-projection center electrode and tapered seat type to ensure consistent ignition and improved engine efficiency.
Specifications
Center Electrode Core Material:
Copper
Center Electrode Design:
Standard
Center Electrode Projection:
Mid Projection
Center Electrode Tip Material:
Platinum
Electrical Terminal Type:
Non-Removable Nut
Electrode Tip Material:
Double Platinum
Grade Type:
Performance
Ground Electrode Core Material:
Nickel
Ground Electrode Quantity:
1
Ground Electrode Tip Design:
Standard
Ground Electrode Tip Material:
Platinum
Hex Size:
5/8 in
Hex Type:
Hex
Indexed:
No
Insulator Material:
Ceramic
Manufacturer Heat Range:
8
Pre-Gap Size:
0.044 in
Reach:
0.431 in
Resistor:
Suppressor
Resistor Type:
Yes
Seat Type:
Tapered
Skirt:
Yes
Thread Diameter:
14 mm
Tip Configuration:
Power
Washer(s) Included:
No
Wrench Diameter:
5/8 in
4.61 out of 5
892 Customer Reviews
89% of respondents would recommend this to a friend
Ratings Distribution
5 Stars
709
4 Stars
107
3 Stars
25
2 Stars
12
1 Star
39
Pros
88
Improves Engine Efficiency
67
Easy To Install
65
Increases Power
50
Durable
12
Lightweight
Cons
8
Difficult To Install
8
none
6
No Improvement In Performance
4
Decreases Gas Mileage
1
Poor packaging, double platinum tips broke
Best Uses
96
Everyday Driving
61
Replacement
24
Performance Driving
15
Restoration
3
Racing
Car & Truck
13
Casual Driver
11
Auto Enthusiast
9
Mechanic
7
Truck Enthusiast
1
Competitive Driver
Describe Yourself
46
Casual Driver
39
Auto Enthusiast
19
Mechanic
15
Truck Enthusiast
5
Competitive Driver
Most Liked Positive Review
Awesome Spark Plugs
Wow as I have some good exciting news about these spark plugs. I installed them in my 97 Ford F-150 4.6 V8 right along with some new Duralast Spark Plug Wires right, when I turn the ignition over to reveal the results, I was excited at the results of hearing the smooth idle of my ride with them new plugs and wires. I am impressed with the performance of those plugs. They improve my engine performance. They are top notch. I definitely recommend them to anyone. I put my trust in them. They stopped the low speed hesitation i was experiencing, now I do not hear or feel it anymore. Truck feels better. Great investment in them, Autolite you're the best. I had a misfiring on cylinder 3. I am back on the road, they exceed performance to me, I give them a A+++++ beyond. My truck drive very smooth now, better than before. I do not feel like I can feel the idle at a stop light or stop sign, man I got some excellent plugs, now time will tell how good they will last from now until 5 years of the warranty. I'm ready to see will they improve great gas mileage.
Most Liked Negative Review
Each plug had smuges and grease on them
The plugs all had smudges and grease on them out of the box, could tell they were cleaned and the boxes were opened before I purchased them.
Reviewed by 892 Customers
autolite plugs
Staff Reviewer -
car feels better
Bottom Line Yes, I would recommend to a friend
they work
Staff Reviewer -
The spark plugs worked well and was already almost gapped to the neccesary distance. I think the plug will last a long time and will improve my engine efficiency and power for the long haul. If there was something I would change about them it would be nothing because everything about the spark plugs are amazing. All I had to do to install this product was use a 7mm socket and remove the coil then remove the old spark plug and then put the new one back in. It was very simple and only took about 1 hour to finish installing these in my mustang gt.,............................................................................... ........... . ..
Bottom Line Yes, I would recommend to a friend
Awesome Spark Plugs
Staff Reviewer -
Wow as I have some good exciting news about these spark plugs. I installed them in my 97 Ford F-150 4.6 V8 right along with some new Duralast Spark Plug Wires right, when I turn the ignition over to reveal the results, I was excited at the results of hearing the smooth idle of my ride with them new plugs and wires. I am impressed with the performance of those plugs. They improve my engine performance. They are top notch. I definitely recommend them to anyone. I put my trust in them. They stopped the low speed hesitation i was experiencing, now I do not hear or feel it anymore. Truck feels better. Great investment in them, Autolite you're the best. I had a misfiring on cylinder 3. I am back on the road, they exceed performance to me, I give them a A+++++ beyond. My truck drive very smooth now, better than before. I do not feel like I can feel the idle at a stop light or stop sign, man I got some excellent plugs, now time will tell how good they will last from now until 5 years of the warranty. I'm ready to see will they improve great gas mileage.
Bottom Line Yes, I would recommend to a friend
Second time buying this product
Staff Reviewer -
Bought this product for two of my vehicles and have been impressed with the performance.
Bottom Line Yes, I would recommend to a friend
Increased millage
Staff Reviewer -
Should have replaced these about 15.000 miles ago. New plugs increased the millage about 2 mph. Because I needed to remove the upper air manifold along with other assorted parts to get to them, I wanted to take no chances and replaced the wires as well. Great investment.
Bottom Line Yes, I would recommend to a friend
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