NA exhaust ???s (HKS Hiper+)

[KLR142]

Sup guys, my friend is replacing the exhaust on his 91 240 KA24DE... We're getting a catco 2.5" cat, and are now trying to figure out what we want to get for an exhaust. We really want something that's pretty quiet, but 2.5" in diameter as well... There's not much out there off the shelves that fits that very well... The closest thing is the HKS Hiper 65mm exhaust, which seems like a pretty good exhaust. We want the 65mm piping instead of the other 60mm systems that are out there because we want something that'll be good enough for a stock SR swap that'll come in a few years... I know something bigger would be better for it, but price-wise and current performance wise something in the 2.5" size would be good.

So, whaddaya all say?! And does anyone have any pictures or vid clips of the Hiper exhaust or others installed on NA KAs? Let's see and hear'm! Thanks!