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Do you want another 150bhp [kai] or another +500rpm powerband? [t04z]
id much rather have 800bhp+ capability than be restricted at 650bhp+, there are enough gears to always be in the powerband with the Kai.
powerband - the kai will be 5k to redline, and the t04z 4.5k to redline.
it will also make more HP for the boost pressure you run at.
The kai is reccomended over the kai BB, as various sources [including HKS i have read] reccomend that the Kai BB is only used at max of 1.9bar, but the Kai is used at 2.3bar+....
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