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Old 02-09-2012, 01:45 AM   #10
Ghostrider 310
Ex Esso kid
 
Join Date: Dec 2005
Location: NY
Posts: 1,605
If you are talking about the triangular flange where the header meets the exhaust, those are more like splined, press fit, hardened studs. They can be removed by using hardened titanium twist drills. Work by progressing from smaller sizes up till you reach just inside the stud diameter, then tap out with small drift.
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