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Old 12-31-2023, 08:16 AM   #64
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Join Date: Dec 2023
Location: Utah
Posts: 8

Originally Posted by Nitro V8 View Post
Old thread revival!

I have collected all the parts together to do the 74mm tb conversion on my 2003 facelift s.
74mm tb, 996 plenum, 80mm silicone and Ali tubing, various jubilee clips.
I also have a modified 987 airbox and 987 maf tube and maf.

A few questions to those in the know
1) Will I still get improvement in power by fitting the 74mm tb and 996 plenum but retaining the 986 airbox and maf?
2) If I fit the 987 airbox do I need to fit the 987 maf or will there still be benefit if I retain the 986 maf tube?
3) If I fit the 987 maf does it definitely need a re flash to make it run correctly and not throw a cel?

Thank you
I am new to this so sorry if this is incorrect, but where did you find the 74 mm TB that fits the 986/987 IPD plenum?
I have the original 2.5 tb but am trying to find the upgraded TB and am not having any luck so I am curious if there is a throttle body spacer or adapter that is out there to mate these two? Have you heard of an adapter?
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