1. Is it worth it?
2. Where are they located/how to install.

This was because of this...I've heard good things about Iridiums and I'm sticking with OEM wires (forum reading says Honda wires are top notch).
http://cgi.ebay.com/ebaymotors/DENSO...QQcmdZViewItem

 

I've never used them but people who have them seem to like em, Given your engine setup I'm not sure how much you're going to gain over stock NGK plugs but it may be a little smoother....

 

Since the plugs run $12-$15 each I would think it's a good buy. I didn't see anything specifying they were brand new. Unless you have75,000 miles +on the old onesI doubt you'ld notice any difference.

 

Funny thing you mention that....I have 89k on this beast. It's hard to believe I got it brand new in 2003. :-/

Yeahh...I read the manual and it blatantly states it uses DENSO Iridium tipped spark plugs....so more or less its an OEM change.

 

2003 4-cyl has NO plug wires. There's a coil pack on each spark plug, NO distributor, & NO plug wires.

Stock NGK or Denso plugs should be OK since you're not boosting or using NOx.

 

Yeah, just just plop them into the coil pack.

 

so did you find links selling wires for the 7th gen?

 

Erm...what do you mean?

 

Unless "2003" was a typo, your car does not have a distributor. Mine doesn't...

It doesn't use plug wires at all. Each spark plug has it's own coil (#1) and the 12v wiring harness connects directly to each coil.

 

Right...I'm just replacing spark plugs...not wires...since I don't have any.