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Old 02-17-2013, 06:01 AM   #39
concours
WFO for 41 years
 
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Joined: Dec 2008
Location: Kensington, NH USA
Oddometer: 5,361
Hole saw works best, deburr with a Burr-Kwik sheet metal deburring tool. SOUND is the biggest compromise in airboxes. Intake noise can be louder than exhaust.
I'm with the "keep it intact as designed" group.
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