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Originally Posted by kick16
Absolutely nothing!
To be honest, I have two sets of these headers and the other set is on my car. I don't have cats behind mine and passed smog testing with flying colors in Austin, Texas which has very stringent requirements. I believe there are quite a few people that have headers with no cats and don't have problems with smog.
Just another awesome attribute of the LT5  |
I wouldn't promise anyone they will pass the Texas smog test without cats. I have cats and Jeals and I have a heck of a time passing. I live in Houston and we may have higher standards than Austin. So my word of caution is find out the requirements for your area.