SVTBill

whats the diffrence between high flo cats and normal cats? will high flow cats pass emmisions test in Texas? well obviously the high flow cats are less restrictive, louder, and move more air (or do they?) are they worth it? what exhaust systems come with them, etc. thanks.

djb1187

hi flo cats are like your stock cats except less restrictive. they are designed to increase horsepower while still being able to pass emissions. if you live in a state like mine ur better off going no cats. no exhaust system comes with them they are just an option when choosing your mid pipe

sitnlopro99gt

more of an inefficient honeycomb design with there being a lot more smaller restrictive wholes as opposed to hiflos are shorter and have bigger honeycomb wholes to trap and burn unburnt gases

SVTBill

thanks, oh and what is actually diffrent about them, like the design, how do they look diffrent inside?

djb1187

the way he explained the design of the honeycombs pretty much sums it up

sitnlopro99gt

http://assets.audi.co.za/glossary/ca..._converter.jpg

thats more like a stock one as far as the inside looks to get a rough idea