This piece is INCREDIBLE. Im running Stage 3 crowers FC Race Header 2.5 Collector back BOMZ CAI 65 mm t/b w/adapter plate adj cam gears set at -1/2 -4. We did have to port the adapter plate to match (electronic calliper) and we smoothed alot of casting in the manifold and found a very odd piece of close hanger like wire jammed in it?? That kind of irritated me but regaurdless We done custom fabrication for everything cut the new manibolt holes and cut the alternator. It came out very nice the work was approxiamtly 27 hours worth (lengthy process definatly think about this before you try to custom fab one) But afterwords id have to say the pull was the most amazing thing iv ever felt from a focus. 0-60 in 6.98 seconds (the average of 4 runs with a stop watch) 0-100 in 19.3 all test runs were done with one passenger and full hatch. I was very impressed with the initial tests that we got out of the car. I can easily say I smacked up an s2000 with it. I want to get a dyno done but so far Im all smiles and hunting for low low nines in the eigth in 2 weekends when the local track opens up. The engine has plunty of torque as well. I can cruise in 5th up fairly steep hills at 60-65 and i dont loose any speed (2000 rpm) but at 3500 you can tell things are diffrent and at 4000 something definatly is wrong. then like 5500 the car just opens up. If i just role the car upto 5500 hundred and punch it torque steers sideways and rolls the tires. Im not sure how much the car is pushing but it has to be pretty nice. Manifold come from CTZX3 props to the guy best buissness man iv dealth with.