Cognito Motorsports 1" Drop Shackle Prolite Series It also separates the CCV

It also separates the CCV system from the oil fill port for safety purposes

For 2500HD and 3500HD Models with Duramax Engines

exhaust brake

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and you will enjoy a ride quality with this Cognito Performance kit that is better than stock

Cognito Motorsports 1" Drop Shackle Prolite Series It also separates the CCVDetails: Provides 1 inch of drop over OEM shackle Allows customer to dial in ride height and stance Increased strength and rigidity over OEM shackle Greasable and servicable polyurethane bushing provides increased ride quality over OEM style vulcanizedbushings Quarter inch steel contruction Details The Cognito 1 Drop Shackle for current generation GM 2500 3500 trucks lowers the rear ride height by approximately 1, allowing you to dial in your trucks