Alright why in the world does my 1997 GT have 3 cats on either side on the stock pipe?? Seems so retarded to me. How many cats do the newer GTs have? No wonder these cars can't breathe. How much HP can I expect with a PI intake and a catted H/X pipe get me about?
the forward two are not cats, they are "pre-cats". Notice they are small... Supposedly they help the emissions when you first start the engine, while the other four cats are still heating up. The 99+ has 4 cats.
I think bbk claims about 8-12 hp for a catted x, and I've seen posts saying the pi intake gets as much as 20 or so. I plan on getting the intake and gears soon. The intake is supposed to be a drop in replacement. I live in florida(no emmisions tests), so I cut off all four of the cats and put on two high flow cats, and cut out the h and put in an x and I have a catted x pipe for half the cost of a new one. Sounds good without being annoying.
Man that stock H pipe sure looks heavy too. Ive got the Magnapacks on right nw and she growls pretty good but I want to scare people like a big block when I go by them. the 4.10s really woke my car up and she barks second real good right now