Just finished up installing the header, and all is well so far. No exhaust leaks or clearance problems or anything like that. Its obvious Vibrant builds a quality product and puts a lot of r and d into their products.
The stock manifold is one big ugly bitch that didnt want to come out. I took Ag Bullets suggestions of unbolting the rear engine mount and the passenger side mount. With some convincing and swearing it eventually came out, and the Vibrant slipped right in no problem (I installed it as one piece). I managed to remove the head studs to aid clearance without using the proper torx bit. I actually just used a 12 point 6mm socket, and it did the job. The whole job took me about four hours by myself. Not too bad I think.
Now, the oxygen sensors. Both came out of the stock manifold with no issue. I didnt use any penetrating fluid, just an oxygen sensor removal tool. The primary sensor is in the vibrant header right now, and no problems there. The second sensor isnt even plugged into the car, as I have yet to get a bung welded for it. Amazingly I have yet to get a check engine light. You would think not having the sensor plugged in would cause immediate concern to the ECU, and trigger the light, but nope. I havent driven much yet, just a 12 mile jog on the freeway to test it out. Im sure the light will come on very soon. In fact I probably just jinxed myself...
Now for the sound. Its not too much louder than before. A little burblier and sounds a little ricey under heavy throttle, but its a four cylinder, not a v10 so it will sound ricey. I get the occasional backfire when shifting, and some gurgles and pops when downshifting. At idle, its barely louder than before. I already had the Racing Beat catback installed before hand, and an AEM CAI. I can definitely live with the volume, which is good as this is my daily driver (well, only car)!
THE POWER. More midrange punch for sure. Definitely feel a little more power on the butt dyno. Maybe Ill get my car dynoed one of these days. No loss of torque anywhere.
All in all I am satisfied at this point.
