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Old 02-20-2005, 07:51 PM
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Richard Hudgins Richard Hudgins is offline
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Join Date: Jun 1999
Location: Fallbrook, CA USA, CA
Cobra Make, Engine: Porsche 928 S4
Posts: 739
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Hi Folks,

Slip fit connections on headers work very well if the tube clearances are correct. I have found the following to work well.

Non ceramic coated 1.75 dia. tube. .030 total clearance inner to outer cold.

Ceramic coated 1.75 dia. tube .015 total inner to outer clearance.

Note: when assembling, coat the surfaces with standard wheel bearing grease. (I know this may sound strange, but trust me. It works well. Also works well on header to head interfaces.)
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Richard Hudgins
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