Quote Originally Posted by RS8 View Post
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Del Stator:
If you do a test and see that the air box cover no longer sucked down when you remove the silver intake air tubing, then try also to close one hole completely so you only have one open 4 inch hole into the airbox and see if it is drawn together now and with only 500 hp, for then there the risk that it makes it also at 1000 hp but with both 4" holes open.

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Do not do this. IIRC, I seem to recall my airbox being divided inside, with each side of the airbox feeding one turbo. If you block one side entirely, you will starve one turbo entirely. This could be bad.