Blessed Performance for the Wehrli Coolant Bypass/Relocation Fitting for 2007.5-2010 LMM Duramax diesel.
Coolant Relocation Bypass Fitting for LMM Duramax. Located on the Driver Side of the rear engine adapter plate the OEM coolant fitting interferes when installing aftermarket up pipes or manifolds/up pipe kits. This Fitting routes the line for better clearance. No tuning required.