02 durango with new front calipers, pads, rotors, master cylinder, brake booster, and bled professionally lines and abs mod. Back brakes are good. Got great stopping power but I noticed my pedal goes to the floor with a good amount of pressure to the pedal. It's that normal? The pedal holds pressure when its off. When I start it the pedal drops to the floor. I'm thinking a vacuum leak but idk where. Everything looks good. Just did the plenum plate and I took my time and torqued everything and the engine runs perfect. I also have the cat off at the moment and it will be back on soon so only running with half an exhaust. Is this pedal travel normal, have a leak, or is the exhaust the cause?

 

Nobody?

 

How about posting a video of the brake pedal going to the floor?