FERREA INLET + EXHAUST VALVES FOR HONDA K SERIESFerrea valves are classed as being one of the best valves you can buy in the tuner market. They offer supreme quality and performance. They are available in standard compression and higher compression (flat face). The flat faced version will increase the compression ratio on a K series engine by between 0. 2 and 0. 3 of a compression ratio , which can be great if you are trying to run a slightly larger camshaft set on a stock bottom end. Set comes as