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911nut 911nut is offline
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Join Date: May 2001
Location: Michigan
Posts: 2,511
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On the Fabspeed website they cut open a stock muffler which revealed that there isn't much in there to impede exhaust flow so why would a change in muffler be necessary?
Rarly, if one were to port the heads, wouldn't a larger intake manifold be required also?
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Paul B.
'91 964 Turbo
Port matched, SC cams, K27/K29 turbo, Roush Performance custom headers w/Tial MV-S dual wastegates, Rarlyl8 muffler, LWFW, GT2 clutch & PP, BL wur, factory RS shifter, RS mounts, FVD timing mod, Big Reds, - 210 lb
Old 05-05-2007, 12:39 PM
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