Honda/Japan JDM Conversion Honda/Acura Oil Filter 90-UP - P/N: OILFIL1 Product Model: HON-OILFIL1 JDM (Honda Japan) Hamp Synergy Oil Filter, for Honda/Acura 90-Up -The latest technology available from new engine development. -It keeps the same performance at a smaller size by improving the filtration material and its construction. Features: Body - Anti-corrosion paint Relif Valve - It keeps oil circulation by adjusting the oil flow when the element is stuffed, or when the engine was turned on under ultra low temperatures. Element - Using high performance element which effectively catches corpuscle like dust and carbon particles. Drain Back Valve - Heat-resistant silicone rubber which prevents countercurrent oil when the engine stops, and because of this, oil starts circulating quicker upon re-start of the engine.