My understanding is the main reason is to prevent corrosion, water can stay underneath the wrap which will start the pipe to corrode.....
im not sure at all tho..... i have this debate with myself regularly on my Z and my 11" sti stage 2 with dump tub plumbed back it...
in the end im mostly likely going to take my pipes Z, swaintech coated and wrapped when boosted and get the sti just coated. Most likely it's just a Band-Aid, not really fixing the real problem of the heat in our engine bays.
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Performance: Fast Intentions LTH + CBX + Injen CAI + UpRev + KW3 + Whiteline sway bars + short throw shifter + 34r oil cooler = 335whp + (OS Giken Clutch and Diff)
Interior : Recaro seat + Alpine HU and Rockford Fosgate Amp and Speakers + Passport 9500ci + JDM shift knob + LED's Forged avant garde m310's 19x9 19x12 RE-11
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