Actually, I think the IC is the second biggest gain you can make and dyno proven. It has more to do with flow capability of the bar and plate design than its ability to resist heat soaking.

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Kendall
2008 Sky R3DLIN3
White/Black/Chrome/Auto
Mods: K&N, Koni, SMS Throttle body, Hahn IC & BSR, Dejon IC pipes, elbow, & gauge pod,
Aeroforce Interceptor, Autometer boost gauge.

From my Interceptor: 0-60 4.54, 1/8 8.37 @ 83, 1/4 12.93 @ 104