They will still move the cat on a single cat car. But its not that big of an issue most places won't even notice that it is moved. But if your worried about it then i would get the slp's. They don't move the cat and the single cat version provide a good gain. They are also 1 3/4 headers.

 

When I installed my AS&M Headers, I didn't have move my cat from it's stock location. It hooked right up and I have single cat. If it was me I would diffently go with AS&M, plus they are emmision legal headers.

Tuff

 

i know i keep pushing these things but i really want them to make these things
www.quicktimeperformance.com will make long tubes and they have hook ups for emmissions and all. email them and get the specs

 

Yeah but for the people here in cali. Even if they had the hookups there is no way a inspector isn't gonna pass you with LT's. Mid-length headers are as noticable as LT's. So if you live in cali and you don't have somebody that doesn't care about the visual part at all then at most i would only get mids.