to clear up the cat issue alittle, i had 2 catalytic converters, 1 was from the blue ranger and 1 was from my purple parts truck. i welded new flanges on both cats, but decided to gut the rustiest one just so i would have a "free flowing" cat, INCASE i ever needed a true test pipe to eliminate a converter problem. i was originally going to make a thru pipe to eliminate it all together, but with the 3-bolt oval flanges on the y-pipe it looked like it would be easier to gut 1 cat then to make a custom flange and smash up a 3 or 3-1/2" pipe to fit in the oval flange and then adapt it down to the 2" pipe the rest of the exhaust is running.