Originally posted by bunnymann:
Oops. I just figured out that the stock headers have pre-cats. I swear I did search before posting. Anyway,this is obviously why the stock headers are inferior to the MSDS.
However, about the Y-pipe. What size tubing is used for the stock y-pipe?
I need to make a decision between a stock optimized Y-pipe and a BAT y-pipe with cat. This leades me to my next question. How much better is the cat on the BAT y-pipe vs. the stock cat?
BAT Y-Pipe is better than stock Y-Pipe
Optomized stock Y-Pipe is better than BAT Y-Pipe
Inner Diameter tubing are the same. The bat y has different routing of piping, it just goes down and then back. Now the stock optomized still retains the 180 degree bend. Needed for the stock computer configurations. The computer was designed with spark and fuel curves for the 180 bend. If you go bat you will lose gas mileage.
So my choice get a opt Y-Pipe over BAT.
I reject your reality and substitute my own.
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