Quote:
Originally Posted by kdizzle781
I've been doing quite a bit of reading about the pre-cat failure and all and i am very interested in replacing the exhaust manifold with new headers. Im looking to support MarkSpecV. Any1 recommend MarkSpecV's headers? Easy installs? still works? build quality?
Anyway here is the real question i had about replacing the headers...
I understand the point of the spacer on the 2nd o2 bung. It causes the o2 sensor to get less of a reading by recessing the second O2 sensor away from the exhaust stream. Which equals no light.
I guess my only question is wouldn't this mess with the air/fuel ratio because the ecm is no longer getting accurate readings? Decreased gas mileage? too rich? too lean?
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I bought headers from Mark in December 07 and they were worth every penny. Install was pretty simple actually, took about 2 hours in my driveway. I've noticed a pretty good increase in gas mileage as well. The only thing I don't like is the sound, but all in all, its a great product and Mark is great guy to deal with.