KA24E parts fitment.

[KA24Evan]

I've been looking around for an HKS exhaust for my car, I have a '90 240sx with the KA24E. I don't have all the money to swap in the new motor yet so I thought I'd add a couple parts to the car now. However, when I look for exhaust the SR20DET versions are a lot cheaper than a KA motor. I'm talking about the HKS Hi-Power exhaust system. It's $100 cheaper for the SR version over the KA version, it says its a cat back as well. My big question is, will it fit? or will I have to mod a couple parts? because if it does fit, that's fine and dandy because I can carry it over when the swap goes in. Thanks for your help