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stephen wilson · 05-09-2012, 10:04 AM

There's no way the exhaust after a muffler gets hot enough to blue the steel ( or Ti.). More likely, the bluing is from heating the tubing so the tip can be rolled during manufacturing.

05-09-2012, 10:04 AM	#13
stephen wilson Registered User Join Date: Apr 2008 Location: Southern New jersey Posts: 1,054	There's no way the exhaust after a muffler gets hot enough to blue the steel ( or Ti.). More likely, the bluing is from heating the tubing so the tip can be rolled during manufacturing.