I ordered a hose kit and the lower coupling does not fit. is it possible that they sent me the wrong coupler. I purchased the silicone hose kit from Performance engineering (PPE) and it didn't designate the engine type. I'm wondering if the fitting on the LLY is different than the LBZ fitting, because I know that both the LLY and the LBZ were both sold and delivered as 2006 models, because the change took place in the middle of the year 2006. Mine is the LLY