T the7comeback7ki Member : Mazdaspeed 3 Jul 18, 2007 #82 I think I saw in another post the intro price is as cheap as he can go. Get em while they're cheap!
C Champloo Member : 2007 Mazdaspeed3 Black Mica Jul 19, 2007 #83 Since the testpipe comes after the 1st cat, is it still a reliable place to get accurate A/F readings with the O2 sensor? I was under the impression that the O2 sensor should ideally go before the 1st cat.
Since the testpipe comes after the 1st cat, is it still a reliable place to get accurate A/F readings with the O2 sensor? I was under the impression that the O2 sensor should ideally go before the 1st cat.
