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The Radium King · 06-15-2015, 11:30 AM

my understanding is that 996, 997, and cayman/3.4 987 boxster tbs are all interchangeable and 74mm ID. tt runs a smaller tb because the air is compressed and you don't want to uncompress it by increasing the pipe/tb diameter.

06-15-2015, 11:30 AM	#2
The Radium King Registered User Join Date: Apr 2010 Location: Canada Posts: 3,152	my understanding is that 996, 997, and cayman/3.4 987 boxster tbs are all interchangeable and 74mm ID. tt runs a smaller tb because the air is compressed and you don't want to uncompress it by increasing the pipe/tb diameter.