If volume is the same, and pipe size the same, the velocity would be about the same. However, I was talking about the Precat converter, rather than the O2 sensor. I thought the question related to pre-cat failure rather than sensor failure.



My name is Richard. I was a Contouraholic. NOW: '02 Mazda B3000 Dual Sport, Black BEFORE: '99 Contour SE Sport Duratec ATX Spruce Green PIAA 510's, Foglight MOD, K&N Drop-in