Sorry if this is the wrong section, this is the second post on this website. Im getting my head gaskets done and my heads machined on my 1999 4.6 2v. but this has nothing to do with that. I live in california specifically los angeles and i was wondering what kind of short tube headers to get. I saw some cat4ward headers that are legal here (also wondering what the hp and tq gains would be) but i was wondering if i put some short tubes on without cats (how much more hp and tq than the catted ones?) the cops would not notice right? and how would i get the check engine light off and would it cause any issues not having those cats but instead keeping the other 2 catalytic converters? hopefully you guys can help me decide what i should do. also would underdrive pulleys help with mpg and performance?