I had a chance late yesterday to jack the car up and climb underneath to get a better view of what the exhaust looks like. Simple enough! Main cat, flange, 2nd cat, flange, 90 degree turn, another 90 degree turn, resonator, flange and muffler.

At this point, I simply want to change the B pipe to 2" (After 2nd cat and before the muffler). I can get the mandrel bent elbows and have a shop weld on the straight pipe. That part is easy. The part that troubles me is the flange itself. It seems it may be a waste of time to transition from 1.75" (Or whatever the diameter size of the exit flange from the 2nd cat is) to 2". Even still, where the heck would I get a 2" flange that could connect to the 1.75" diameter flange? I don't think the diameter would be a problem but the flange connection itself. Where could I get this from?

Even if it did nothing horsepower-wise, at least I'd be setup and prepared for any modification to the section with the two cats to be upgraded to a larger diameter size. All this piping does seem really small though. 2" should be the ticket. And that 1st cat's 90 degree turn from vertical to horizontal looks like it just plan sucks.

 

The 2" flange store. Duh!

 

We only have a 1.75" flange store here. *Small town*

I was at the muffler shop earlier and am deciding to wait it out. I want to do this right the first time and have all my piping the size I want, from the engine exhaust ports to the muffler. The muffler was the most important part and I got that out of the way.

 

Look on this forum. I think there was a T1R b pipe up for grabs in NY not to long ago. Also the MR B pipe is fairly legit. Not a bad buy although it is 2.25".