2.5" or 3" Y-Pipe diamater?
2.5" or 3" Y-Pipe diamater? I know, I know....use the search function. I have and noone seems to have any reason to use either. My question to everyone is the following: I have just recently discovered that my passenger side cat's membrane is not adhered to the cat-body anymore. Basically.....its shot! The car only has 59K on it so I know I can have it replaced for nothing under warranty but I am also exploring header and catted y-pipe options. I have my choice narrowed down to (2): Stainless Works and Kooks. Stainless Works comes with Random Tech. Cats and 2.5" ypipe (similar to the system on my 04 Silverado, below). Kooks now come with a stainless 3" y-pipe and cats (MagnaFlow I believe). The Kooks are approximately $200 more by using TByrne's websites prices (only one I could find with stainless y-pipe price available). I have just recently ordered an SLP lid and I have a Flowmaster exhaust and Nelson tune. I plan on getting rid on the Flowmaster for a MagnaFlow but I doubt it will happen before the headers. After that I plan on doing a cam (mid-to-high 220's) and will more than likely never do heads, but you never know. The car is primarily street driven and will, at most, only see the track 10 runs a year, MAX!!! I am a huge fan of "driveable power" (i.e. torque down low right off idle but still has lungs up top if need be) What would you recommend and why know what I said above? Any help/opinions/tips are appreciated!
Having mine built with 2.5" and Random Tech CATS. The 2.5" will handle the flow until you are pushing well over 500 rwhp. Use a good merge collector and a free flowing catback and you will be fine.
Originally Posted by sdbrown84
Having mine built with 2.5" and Random Tech CATS. The 2.5" will handle the flow until you are pushing well over 500 rwhp. Use a good merge collector and a free flowing catback and you will be fine.
