This was done to see how much more hp they make and to let more air flow out. I guess it will make about 10-15 more hp with a 2 3/4 Y-pipes from the header through the cats and 3in cat-back system.

 

how did you do it, im going to need to do mine soon

 

Yes please give us more info.

 

You cut off up to the O2 sensor nut, use a pipe spreader to enlarge the collector without splitting the metal then weld on a ball-n-socket collector in place. Of course you may have to take it to a muffler shop that will do it for you.

 

Is there going to be any clearance problems with the pan or the steering shaft?

 

No! The lenght of the collector didn't change.

 

Where did you get the 2 3/4 flange at? I have seen 2.5 and 3 in. Do they make a 2 3/4 pipe? I was thinking about doing the same thing with 3in. You have pics of the y pipe?

 

Looks like a good modification. That should add some power to the higher horsepower motors. A good muffler shop should be able to do the mod with no problems.

 

poo, i was hoping it was something painfully simple. mine are cveramic coated so cutting them is out of the question... thanks anyway

 

No pics of the Y-Pipe. The Y-Pipe will be built on the car. You can buy 2 3/4 pipe and have it modified for ball-n-socket fit. And yes you could do it with 3in pipe.