These super high quality filters are made 100% in the USA with 6061 billet aluminum. Knurled for easy grip. High Flow Oil Galleys. Easy to Replace Disposable 8 Micron Filter Element. Made to spin on the standard filter mount to replace your HP1 or PH8A filter. Filter elements are designed to last approximately 12,000 miles of street driving and/or 600 miles of racing. Filter elements must be replaced should any engine failure occur.