For most cars, removing the catalytic converter and replacing it with a straight abundance of exhaust tubing called a examination conduit is a unabridged misspend of age. Whether the converter is welded on, you'll committal to spend hours cutting the pipes and welding in a distinct abbreviate and all the more then you're unlikely to peep besides than five horsepower. Reduced back-pressure allows the turbo to spool up easier and bring extra boost. Mazda has driven the cost-benefit ratio finished the roof by manufacture the test-pipe a bolt-in matter. On the contrary, federally speaking, you can't accomplish this procedure at all unless you're an EPA-certified technician.
Bolt the rear of the test pipe onto your exhaust system using the stock nuts and bolts. Tighten the nuts and bolts to about 50 foot-pounds.
Remove the two rear catalytic converter nuts and bolts and remove the nuts on the front of the catalytic converter studs. Grasp the tube at the end your converter, pull it backward and off to one side. Haul the catalytic converter from the downspout attached to the engine. You may want to persuade it a miniature by tapping the back of the converter studs with a hammer.
3. Unplug the wiring harness to the moment O2 (Oxygen) sensor, the one on the rearward divide of tubing that you removed. Plug the MIL eliminator into the oxygen sensor harness and then plug the chassis-side harness into the MIL eliminator. The MIL has a one ohm resistor in it that will modify the signal coming out of the O2 sensor and trick the computer into believing the converter is still there.
4. Bolt the test pipe to your engine downpipe using the supplied bolts -- you'll need them since the converter took the mounting studs with it.
