14mm Duramax Gorilla Girdle Kit (LB7,LLY,LBZ,LMM)The thick Gorilla Girdle is the strongest girdle on the market. It utilizes the XXL ARP 14mm main studs.

• This custom girdle fits the LB7, LLY, LBZ, and LMM Engines from 2001 - 2010
• Core charge on the upper oil pan 250.00Core charge is added to part price
• We will credit the core charge back when we receive the old upper oil pan.