Ultimte Racing (UR) Downpipe and HFC
I'm in Canada and winter are really bad on the bolts... Would help to protect it if it's feasible :P
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The CEL would be from the O2 Sensor seeing different A/F readings than what the car is programmed to accept. Wrapping the pipe shouldn't affect that as its intended to control heat.
If you're concerned about the bad winter weather on the bolts, try using the high corrosion resistant bolts such as 18-8 stainless steel grade bolts.


