h flow cats are a waste of money, dont lower the sound , dont help the environment all that much and are ILLEGAL. they are only sold to make a car conform to various competition race groups. Did I ,emtopm they were illegal? as illegal as having not cats?

jason

 

It was not a turbo car. It was a mustang. I bought an X-pipe with Hi-flows on it. The cat positioning was the same as stock. It really doesn't matter whether they will pass or not, they will fail visual and like mmboost said, they are illegal.

 

wtf when did helix start making catted UPPIPES?


and touching any catalystic convertor is still illegal unless the original ones have failed. So if the cop is really an ***, he'd still bust you for it.

 

I didnt mean to say helix, my bad.

*EDIT*

I was just talking to a friend, and there are rumors about them making one. The Helix Down pipe with a cat is out and its only a matter of time until the up pipe comes out.

 

Even if the original one fails, you must replace it with an OEM or OEM equivalent.... MAYBE you could get away with stuffing a different cat into an OEM pipe (cut & weld ).

jason

 

helix downpipe is out yes sir!

read jason's post above to see if it's really worth the money.

 

aahhh that explains it, what year was your mustang? well believe it or not our subarus are pretty clean from the factory, the JDM rendition of the impreza has only a single cat which burns pretty clean from the factory, it is only because of CARB and stricter emmisions is the reason for the 3rd cat in the USDM cars, hence the reason it was also raised to make it even more cleaner.

so taking one cat wont even hurt, considering the whole outlook of factories, large SUV's, old broken down cars on the road, are what is making the real pollution. Subaru cars are a little more efficient at emmisions it is only because of stricter laws and higher standards is why our cars are like this, in comparison to your mustang if it is older it only had to abide to the laws at the time, (to be honest i dont know the configuration of mustangs so i cant input the reason why it did not pass emmisions even with hi-flow cats) so in comparison to subarus its detrimental and mute, lets compare apples and apples here...(what will work with one car may not work with another IE CAI's come in mind....)

again visual will fail, unless you have a mickey mouse job or are very good at working 'stealth' ;-)

 

if you purchase a helix downpipe, the only part remaining that needs to be changed is your catback exhaust.