Review on Kwiksen Heated 2-Piece Air Fuel Ratio O2 Oxygen Sensor Set 1 & Set 2 (Upstream and Downstream) - 234-9041 & 234-4149 by Dinero Bentz

so I just installed both replacement parts on 19th July 2020. My originals had 291,000 miles on my 2005 tC. (yes, this is the original seal and NTK from the factory). I couldn't tell any difference compared to OEMs. I installed and definitely saw my fuel capacity increase. The idle seems smoother. I've ridden about 502 miles since installing it, mostly for a trip to the beach and a short drive back. I didn't give 5 stars because I didn't want to be hasty and claim perfection. A bang for the buck, this set was undeniably value for money. I couldn't tell any difference compared to my OEMs. Whether it's an attitude or a necessity, I would recommend it. I'll update the date in a few miles but I definitely don't see anything negative.