Andy,
I was able to find the T3 and T4 dimensions for you on the Garrett turbo site. If you have a T4 flange on your headers, I'm curious what turbo you have mounted. Visually, it doesn't seem to require that big of a flange.
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Dave
'85 930 Factory Special Wishes Flachbau
Werk I Zuffenhausen 3.3l/330BHP Engine with Sonderwunsch Cams, FabSpeed Headers, Kokeln IC, Twin Plugged Electromotive Crankfire, Tial Wastegate(0.8 Bar), K27 Hybrid Turbo, Ruf Twin-tip Muffler, Fikse FM-5's 8&10x17, 8:41 R&P
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