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Old 11-16-2019, 04:41 PM   #1
Jasper_Boxst
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Join Date: Oct 2019
Location: West Coast
Posts: 19
74mm 996 throttle body on a 2.5l engine?

I have a 1999 2.5L Boxster with the (68mm?) cable throttle body. We all hear about the easy gains of HP and torque a larger, 74mm plenum such as IPD can give to the 2.7 and 3.2 engines. I was wondering why IPD has never made a Y plenum for the 2.5? I 'think' it's because the 2.7 and 3.2 have the e-gas throttle vs the older, cable throttle.

So I'm wondering, has anyone ever installed a 996 c2 74mm cable throttle body onto a 2.5 and then installed the 74mm IPD plenum? Keep the stock MAF housing for the computer readings? I have NO idea if this can even be done!
(This is just a cold, Saturday afternoon's musings)
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