I have been looking at these and would appreciate any input, they are made by Tokyo Roki from what I understand from Roger Clark co and supposedly filter better and have less restriction. It seems there is some important info missing.
RCM High Performance Oil Filter
A Subaru oil filter designed to overachieve in all areas of performance and quality
rogerclarkmotorsport.co.uk
RCM Race Oil Filter Special - 3-pack
Roger Clark Motorsport has developed their Race Oil filter to be the optimal oil filter for the Turbo Subaru EJ Engine. RCM used a very good filter media, and designed the filter to be as efficient as possible so that creates the least restriction possible to the oil as it is traveling into the...
www.flatironstuning.com