I have an 02 Wrx and just bought the Infinity Kappa 6.5 (front) and 5.25 (rear). I know that I would need spacers from www.IAPERFORMANCE.com to make these speakers fit. What I don't know is should I buy the thin or thick kit? What's the difference?

 

Ones thin and ones thick...

https://w109.webminders.com/iaperfor...plications.pdf

 

basically the same half cooked answer I got when I'd asked, "how thick is the thick? and how thin is the thin?"

Guess it's some sort of trade secret not to reveal the thickness, i.e. thin = 5/8" or thick = 1" thickness.

 

I don't know what the actual thickness is, but thats not important unless you are making your own spacers...just look at the chart on their website for fitment.

I cut out 3/4" thick spacers for my 6.5" mb quarts (about 2.5" mounting depth) in the front, and I'm in the process of doing the rear speakers now.

If you are unsure of which ones to get, just get the thick ones and be done with it!