Well i finally fitted my catch can, surprising how much you end up ripping out! Ive got a question though since some of the can threads dont seem to have an answer... The pipe that come from the inlet manifold is the brake booster line i believe? Now mine has got 2 one way valves, one near the inlet and one further back near the firewall...do they both need to be there? Or can i do away with 1 and be happy?