the 10.5 will feel a lot less responsive than the 7.5. even with the end points etc. turned down, you still get the instantaneous torque with the lower wind motor. if you are 2wd then the 10.5 would probably be of benefit to you as the car will be a lot more passive, you can always mess with timing and turbo when you want more speed and the car will remain smoother. 4wd you might not notice it as much
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