What can you tell me about the 74mm TB?

[edc]

Originally Posted by KRAM36

He didn't just list a TB and plenum change he also listed the 987 air box. You changed to a larger MAF housing, even with a tune I believe that's a mistake. It's way more then 5 hp.

I think you keep confusing my cars and listing things which I haven't done! I have had 2 Boxsters both modded, but both different. One is a 550 with the standard 987 airbox and the other an early S.

I did the most work and dyno runs with the S. Mods as in my sig and posted previously ie no MAF change or 987 airbox and it totalled 20-25bhp.

As I mentioned, the TB with intake in isolation gave about 5bhp.