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acme911 acme911 is offline
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Join Date: Nov 2011
Location: Monterey, CA USA
Posts: 393
Hi, I have a 3.0 too. Had my muffler shop make caps for the lower holes. After tuning the car and driving it for awhile I purchased some motorcycle baffles and inserted them through the previously capped lower holes. Created a little back pressure, lowered the decibels and a created a really great sound!
Overall very glad I went this route.
In the future I might install electric cutoff valves and have them actuate through the ECU.

Werk Build
'74 911, Steel Wide Body Hotrod, 3.0, Jenvey ITB’s, AEM Infinity, KW V3's, Eibach Sways, JWest shifter and other stuff.
Old 02-03-2019, 10:57 AM
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