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Old 10-24-2020, 04:34 PM   #6
Markoz28

 
Drives: 18 ZL1 nightfall grey A10
Join Date: Apr 2018
Location: RGV Texas
Posts: 1,527
Testing should be on a ZL1 that has been tuned and then add this only to it and then retune. The HP number difference should be the indicator of what affect this or any Lid would have.

If it’s 25whp with the lid and tune then I would save my money and just do the tune. Tune alone is about that much gain.
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