beancooker wrote:I use the Warpspeed pipe, and have had no problems with it. Cattman is almost identicle. I use a high flow cat, and have had an argument with a few people about it, I believe that it does flow at a higher rate. There was a considerable difference in sound (it was louder) when I installed the cat. That tells me that it was flowing at a higher rate. The Y-pipe was worth every penny I paid for it.
I second that. The sound does get louder meaning air should be flowing more freely but not necessarily.
rxm6 wrote:You know, I worked at a Porsche/BMW shop not to long ago and the owner, as well as a few of the other mechanics, swore that a high-flow cat was absolutely no different from a good ol' stock cat. Yet, I understand what beancooker is saying about it being louder and therefore having more flow. I think if someone here on this forum had access to a dyno or a smog machine and the time, I think the hi-flow cat vs. the OEM cat test would prove to be an interesting one.
here is the one thing i never did dyno it to see the difference between the high flow cat and the stock oem cat. When i had mine installed i did notice a little bit of difference but i mean miniscule but when you have your car for so long any little difference you learn to pick it up instantly. To be honest i had the high flow cat and removed it and put a test pipe and as for the y pipe i had my Warpspeed y pipe now for 3 years and its perfectly fine so for the buck warpspeed is the way to go but any y pipe is going ot open up your car like a 20 dollar bill opens up a stripper.