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RarlyL8 RarlyL8 is offline
Crotchety Old Bastard
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Join Date: Jan 2000
Location: Huntsville, AL
Posts: 14,328
Header Primary to Exhaust Port Fitment

Thought I would share some of the observations that we see when working to improve exhaust system function/performance. Most folks are aware that the heads are machined to allow the headers to slide up inside them. This gives a really nice transition and reduces the chance for gasket burnout and mis-alignment at the port. Having the header tube just meet the head when torqued to spec is the goal. Reproducing this measurement on every primary is not easy and why I am looking at it.
Anyway you don't get to see this alignment very often so here is a picture.

RarlyL8 Motorsports / M&K Exhaust - 911/930 Exhaust Systems, Turbos, TiAL, CIS Mods/Rebuilds
'78 911SC Widebody, 930 engine, 915 Tranny, K27, SC Cams, RL8 Headers & GT3 Muffler. 350whp @ 0.75bar
Brian B. (256)536-9977 Service@MKExhaust Brian@RarlyL8
Old 08-14-2011, 10:45 AM
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