I had a right angle drill which made the manifold install easy. Not sure If I would have done it that way with a regular drill or not due to the tight quarters.

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2007.5 Dodge Ram 3500 HD,QC, 6.7L Cummins, 6speed Auto, 4X4, Bighorn Edition.
Click for installs: Carr Steps PML Diff Cover Edge Juice with Attitude Volant Intake Hankook ATM RF10