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DENSO Iridium TT Spark Plug: Ultimate Endurance and Power, 0.4mm Iridium Tip, ITF20TT
1 year warranty
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Product Information
Product Details
Part No. 4716
Warranty Details (1 Year Warranty)
The Iridium TT Spark Plug combines the durability of an OE-style plug with the unmatched power and torque of high-performance engineering. Featuring a 0.4mm Iridium center electrode - the world's smallest diameter - it maximizes firing potential for superior ignition. The 0.7mm needle tip ground electrode enhances spark energy while reducing heat quenching, ensuring consistent performance. Built with DENSO's patented Iridium-Rhodium alloy formula, this spark plug boasts the highest concentration of Iridium among competitors, delivering exceptional durability and reliability. The 360-degree laser welding process guarantees a robust bond and structural integrity, even under extreme conditions. Designed to withstand temperatures exceeding 4000 Deg F, this plug is engineered for endurance and peak performance. Its tapered seat type ensures a secure fit, making it a perfect choice for those seeking long-lasting, high-performance ignition solutions.
Product Features:
Product Features:
- 0.4mm Iridium Center Electrode: World's Smallest Diameter that maximizes firing potential
- 0.7mm Needle Tip Ground Electrode: Promotes higher spark energy and less heat quenching
- DENSO Patented Optimized Iridium-Rhodium Alloy Formula: Highest concentration of Iridium vs. competitors for greater durability
- DENSO Patented 360 degree laser welding process: Ensuring exceptional quality bond and structural strength with the Iridium Center Electrode
- Durability of an OE style plug combined with Power and Torque of high performance.
- Withstands temperatures greater than 4000 degree Fahrenheit
- Iridium TT
4.69 out of 5
532 Customer Reviews
80% of respondents would recommend this to a friend
Ratings Distribution
5 Stars
450
4 Stars
48
3 Stars
6
2 Stars
9
1 Star
19
Pros
3
Improves Engine Efficiency
3
Increases Power
2
Easy To Install
1
Durable
1
NONE
Cons
1
CAUSED MISFIRE AN POSSIBLE ENGINE DAMAGE
1
None
1
Need To See Better Mpg
1
Do not work right 2 bad out of 7 is not good
Best Uses
3
Everyday Driving
2
Replacement
1
IN THE GARBAGE CAN
1
Replacement Plug
Describe Yourself
2
Auto Enthusiast
2
Casual Driver
1
Do It Yourself
Most Liked Positive Review
Great plugs
The owner of the vehicle said that she has experienced much better power and pickup in her Scion XA than she had before. She stated that she had to "punch the gas" in order to get the car to take off from a stop (automatic transmission) prior to the spark plug replacement. After replacing the spark plugs, the vehicle accelerates smoothly from a stop. The owner also says that the vehicle shifts more smoothly and appropriately (for the engine speed) than it did prior to installing these plugs.
Most Liked Negative Review
I'd Buy the product again, but not from Advanced Auto.
4 of 8 gap out of spec. Dense IK20TT spark plugs come 4 packed into one box (4 pack). Yet Advance Auto local store bagged up my online order, handing me one 4 pack an 4 individual boxed (total of 8). I mention this to the store manager, that these 4 singles were likely returns and defective (bent or gap out of spec). He said no they opened the 4 packs for inventory purposes. So I took them, as they said they didn't have anymore in the store. Get then to my shop and inspect. Sure enough the 4 signals are out of spec. NOT HAPPY!. Now I'll need to head back to Advanced Auto, another 30 minutes out of my day for parts run. I called Advance first, so they could get more in. They said they call when in about 3 hours when in. Two days later still no call from Advanced Auto. So I called, they were in. So I took back the 4 bad to just swap out, they would not swap. They refund me the internet purchase back to method of payment. Now I need to wait 3-7 days for that credit to hit, and give my credit card again to buy 4 more. Tying up my funds and costing me interest on the float. If that's not bad enough. Advance Auto Manager now charge $10 more for same spark plugs, than he refunded me. The internet price with discount and my Speed perks bucks no longer applied. Good by Advanced Auto.
Reviewed by 532 Customers
Very good quality
Just installed these in my grand marquis with 166k miles on it. The engine is the 4.6l v8 and calls for a plug gap of .052mm and the plugs were pre gapped at about .042mm. I didn't have the tools to set the proper gap but I read an article online that said if it's a performance plug you can get away w a +/- of .01mm without any issues. It said running .01mm closer would give best performance HP wise and going .01 wider increases fuel economy.
Anyway! After installing the plugs and new coilovers I noticed a drastic improvement in acceleration, idling, and engine noise. The engine is quiet when idling and cruising, but when I get on it I can hear the engine purr. It's not loud just clean combustion
The plugs come pre gapped at 2 diff gaps...that's why the dumb*** with the ranger had the variance.
Bottom Line Yes, I would recommend to a friend
I would buy this product again
Staff Reviewer -
These plugs work very well. I notice an increase in acceleration and smoothness of the engine. Gas mileage has also increased.
Bottom Line Yes, I would recommend to a friend
141 Williams Road
I tried them because everything online said to get them. I guess they worked fine, but at about 69,000 miles from install, I started getting misfires. I hooked it up to a code reader, and it told me which one.
I replaced it with an old one (yeah, I'm the guy who saves the old plugs for this reason), and that solved the problem. Just bought the NGK plugs that were on it originally, for less than half the price, and it works the same. I wouldn't spend the extra money, and definitely don't pay attention to the 100k+ mile headline on these.
Bottom Line No, I would not recommend to a friend
Spark Plug Iridium TT for Lexus RCF
Smoother acceleration at all gears.
Bottom Line Yes, I would recommend to a friend
Theses are not long life. Expect 50,000 miles tops!
Have been installing many of these since they first came out. While they perform great when new due to their design, be prepared to replace these Denso Iridium TT plugs at 40-50k miles as these fine tips will erode completely and result in a massive spark gap and resulting misfires by 60,000 miles or less in some engines. The car I first noticed this issue on was a 2011 Kia Soul. 2.5 years and 50,000 miles later the fine tips on these IR TT's were completely eroded and misfiring badly. I replaced these plugs with some long life double platinum NGK Lasers and new plug wires too. Lesson learned!
Bottom Line No, I would not recommend to a friend
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