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I have the IPD plenum + the 82mm TB on my CSS. I noticed an improvement in mid rpms - 2500 to 4500. Feels like a bit more grunt in that range. But nothing neck snapping. It is my understanding that to really feel the burn, you should include a software upgrade. But I'm reluctant to do a tune because of all the inherent weaknesses in the M97 and feel a tune would just push me quicker to a failure. There's a father-son duo in our club who've done tunes with the famous tuner and both have ended up with issues. The father has a 981 GTS and the son has a 987.2 S. So I'm fine with my extra grunt and nothing more. Was it worth $900? I'm not sure.
YMMV
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GPRPCA Chief Driving Instructor
2008 Boxster S Limited Edition #005
2008 Cayman S Sport - Signal Green
1989 928 S4 5 spd - black
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Threaded Mode
