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i have a 2001 dx and have a magnaflow cat back, i'm planning on putting the v2 and was woundering if i should go through the trouble of buying the ex header and uni high flow cat or stay stock for headers....someone help?!?!

 
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stock header works fine, the ports are already the same size as the engine so going bigger usually causes performance loss.

 
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i hear doing hi flo cat usually makes exhaust louder...just so u kno

 
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so just go with the v2 and i should still have good air flow ?

 
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the ex headers and a cat deletion could add about 10hp. just make sure you have an O2 simulator.

 
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The problem with the DX header is the cat is built right onto the header and it's pretty restrictive. yeah, doing some headers and cat-delete will help a bit (and be illegal).. if you don't get the CELs... but doing a header / high-flow cat is better.. There was an article about it somewhere showing that a high-flow is actually better than cat-less, I'll see if I can find it.. plus it's legal.

Not only does it give you a bit of a kit over the stock header/cat it will make the exhaust a bit deeper / louder - but not annoying.

And, just an fyi - I just so happen to be selling an 01-03 DC Sports 4-1 header (with o2 sensor extension cord for the DX) and a Random Technology High-Flow cat w/ dezod install kit. PM if interested.

[EDIT]
Here's the article I was talking about - http://www.importtuner.com/tech/impp...ers/index.html

 
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yeah and blown ear drums and angry neighbours...

 
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wow, thanks guys, you've been a lot of help