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Old 07-02-2012, 05:28 PM   #4
amroof
Scooby Specialist
 
Member#: 211224
Join Date: May 2009
Chapter/Region: RMIC
Location: Aurora, CO
Vehicle:
2005 Mystical
UniCorn FXTi

Default

de shrouding the heads cleans up any sharp edges on the cylinder heads! these edges cause hot spots and can cause detoniation aka engine destroyer.

you get these edges as you are putting a head from n engine with a factory bore of 92mm and putting them on a factory bore of 99.5m so lots of edges in the cylinder are exposed.
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