Since SEROW is easy to exchange, let's put it in immediately
Improve fuel economy of SEROW, launch Torque up. Although I do not know clearly yet, Plug basically exchanges with Windshield IRIDIUM. Considering the exchange Span and the price of the product, I think that it is the Custom that has the most effect than anything else.
I'M SATISFIED OF THIS PRODUCT.
SO I NOTICED AROUND 5000 RPM ,THE ENGINE SEEMS LIKE TO HAVE BLOWS. AS IS AN RACING PLUG YOU HAVE TO MAINTAIN A CERTAIN POWER FOR AVOIDING BLOWS.UP 5000 RPM YOU HAVE GOOD SENSATIONS.