Denso U-Groove Traditional Spark Plug Stock Heat Range 3381
Manufacturer Part # K20HR-U11
This innovative Denso spark plug comes equipped with Denso’s patented U-shaped ground electrode. The U-Groove forms a channel for the spark nucleus to form at the instant of ignition, which generates a more potent spark.
More importantly during regular service intervals it is wise to check your spark plugs for wear, because new spark plugs will ensure for a healthy running engine, increased fuel economy, and better response. These are the factory heat range spark plugs for your vehicle, and should be a direct fitment.
RallySport Guarantee - 30 Days
Items that are covered under the RallySport Guarantee offer a 30 day no questions asked return policy.
RallySport Guarantee items may be returned within 30 days of the original invoice date and must include all the original parts and contents for a refund.
The RallySport Guarantee does not apply to products that have been modified, damaged, misused or abused. All returns require an RMA (Return Merchandise Authorization) Number, and freight charges are strictly non-refundable. For more information regarding our freight refund policy, please refer to our return policy page found HERE.
Brocks003k17867 3 years ago
The plugs are great. Make sure you check the gap though. 3 were gapped at .043 the third was .054.
Great but. . . .
ScoobyDubi 3 years ago
I just installed these on my 05 Subi FXT. First off, they come pre-gapped but I double checked them anyway. Not sure if it was just mine but they came pre-gapped for the non-turbo 2.5L forester. No problem so I just re-gapped them and installed. Secondly, while trying to install my coils it was pretty tough to get the boots around these plugs. It felt almost as if I was jamming them in there. I took it apart a few times just to make sure I was doing it right. Only one of my coils slipped right over the plug. Anyway, took them for a quick little spin and the FXT runs great. I would definitely recommend as a stock replacement just make sure you have the gaps correctly sized.
Namelessghoul 3 years ago
Installed on '10 STI, runs great!
MSPSTI 3 years ago
Checked the gap on all plugs and they were dead-on right out of the box. I would advise everyone to be careful when removing the ignition coil connectors. I broke one of the plastic clips and had to install a zip tie to keep everything tight.
Fazgt 4 years ago
Items as described by RSD. Great quality
Q: pricing dukes 2 years agoAnswer
is this a price for just one...and these are replacement for 2012 wrx right?
A: This will fit the 2012 WRX, and this is the price for a single.
Nick S. 2 years ago