Sorry to re-post from another thread but I hoping to get an answer and move forward and order some headers.
Being RHD I can go for the 250 or the 400. Other than 'the 250 is better at high revs and less so at lower revs' versus 'the 400 is better at lower revs and less so at high revs' I can't find any qualitative assessment of the two. Am I sacrificing 10% power at 4000rpm to get 2% better at 7000rpm on the 250? If that is the case I'd probably go with the 400.
If anyone can help please shout out otherwise I'll have to flip a coin!
The main plan is to optimise for track days and hopefully get a good bump for DD and flatten the torque curve. I think the 400 is better for linear torque but at what expense at the top end?
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