Why? you're more likely to crack the pipe when you wrap these damn things... Do some search they are pros/cons when heat wrapping manifolds/dp etc...
I've never seen elbows crack, just manifolds (pretty much anything stainless tubing). You already have a flex pipe so I wouldn't worry about it.
Steve.
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S14 326 whp, 311 tq @ 15 psi  HKS F-CON V-PRO
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