Reply to "Pantera # 5357 - Rocky's 1973 L model"

rockyMember

Headers -

So my car came with a set of "Big Bore" headers (at least that's what I think they are). Looking at them, they were coated, and in good shape, but when looking in the collectors, we noted significant restrictions to flow. Since we were optimizing flow in this engine build with porting of the intake manifold, intake ports in the heads, and the heads themselves, it didn't make any sense to have restriction in the exhaust.

photo 06-17-20141Medium_zps3b9d943d.jpg~original[/IMG] </a><BR><BR><a href=

photo 06-16-20145Medium_zps83eaaf0f.jpg~original[/IMG] </a><BR> <BR><a href=

photo 06-17-20144Medium_zpsfe354a8b.jpg~original[/IMG] </a><BR><BR>The header attachment bolts were machined with a locating boss in the bolt flange. This allows a more positive header alignment, and helps to prevent the bolts from loosening up. It's a little tougher to see in these pictures.<BR><BR><a href=

photo IMG_1229Medium_zpsb3289aa1.jpg~original[/IMG] </a><BR><BR><BR><a href=

photo 06-17-20148Medium_zpsa943d280.jpg~original[/IMG] </a><BR><BR>Tubing to the mufflers will be upgraded to 2-1/2

Rocky

PS. This is another example of master craftsmanship by Mark IV / 4280 - thanks, Wade for the help.

6/17/146:44 PM

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