we ordered the largest cat we could find, 2 racing beat 80mm flanges and welded it all up to bolt into the rb turbo back system.

Cool!

Cool.I hope it doesn't leak off those welds tho.They don't look to good. https://www.nopistons.com/forums/pub...DIR#>/wink.png

yah they are ugly but work, pauls relearning how to weld

a cat on a 20b??? BLASPHEMY!!

it made no difference in power that i can tell

what core material is the cat?

i'm not sure, its a magnaflow, the biggest one they make (its the same size as the stock fc main cat!), 3" pipe

Cool! Is it a high flow unit?

by definition every aftermarket cat is "high flow" its a marketing name like "diet" or "fat free"

how did it affect noise?

its a little louder, but it got deeper so this is good. so far everyone who has heard it says it sounds best with no exhaust https://www.nopistons.com/forums/pub...DIR#>/ohmy.png

It sounds better on the videos you posted, with no exhaust.

so you went from the RB midpipe muffler to a cat and it got louder.... https://www.nopistons.com/forums/pub...R#>/unsure.png



i have the 3" RB turbo back and i want my TII as quiet as my old FD, which had a stock exhaust except for a downpipe. does this mean cat AND muffler in the midpipe for the FC?



anybody got suggestions for a high flowing and quiet muffler? anybody put some miles on a spintech?

btw, didn't mean to threadjack, just got excited. https://www.nopistons.com/forums/pub...DIR#>/wink.png i'll take it to the right forum if it's a prob.

the rb turboback is the quietest exhaust there is, maybe a small muffler in the dp?

Way to keep it clean. https://www.nopistons.com/forums/pub...IR#>/bigok.gif



Has anyone ever tried a dual cat setup?

the factory setup is a precat and after the y theres 2 fc main cats.

Mike,



Get a 4" cat from Random Technologies and lets get you a REAL turbo on that car! https://www.nopistons.com/forums/pub...IR#>/bigok.gif

yeah when these turbos die....