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Exhaust manifold bolt size ?

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exhaust
5K views 2 replies 3 participants last post by  crown14 
#1 ·
anyone know the proper bolt size ,thread pitch , and length for the bolts that hold the exhaust manifolds to the 4.6 aluminum V8 block ? I'm using Range Rover P38 stainless steal tubular exhaust manifolds that are 10.3mm thick, and ordering either small cap head bolts or Allen headed cap bolts to make them easier to install and remove. The current ones I have a a little sort (18.2mm) and on the chart I'm looking at they are I believe an metric thread but they are smaller than M10 larger than M8 (leaves it in the 3/8" range )
 
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