also 1 more question, could i buy a borla tip and put it on a flowmaster exhaust system? And does the flowmaster have catatylic converters? if not do i need one?

 

Yes you can. Just as long as you get the right diameter tip. Pretty much standard. Ie, 2.5", 2.25", 3.0"
As far as Cats, are your's not working? Or do you just want high flows?
http://www.justflowmaster.com
Check the 40 series. It shows a nice sound according to thier graphs

 

i would like high flows, ill check the link out.

 

check out pypes hi flow cats and remember to save your used cats and send them to the site i posted ealier for a refund . they buy your used cats regardless of where you buy your new ones.

 

Hi-flow cats, is the diffrence between those and stock cats just more air flow or do they improve exhaust sound?

 

both, hi-flow cats allow more air and more air moving will change the exhaust tone.

 

Whats a good brand of hi-flow cats and how much for a pair???

 

What would I need to buy if I wanted just a dual exhaust, not true? Sorry if its a dumb question, but I dont know much about this stuff.

 

flowmaster ,pypes and a few other companies all make good highflow cats .shop around for prices but i can say a pair of hi flow pypes cats are 155 delivered and i posted a link earlier in this post that will pay $18 each for your old used cats so total $120.

 

you can buy a gt take off and have them installed for less than $400