Product Description
1981 Up Standard Cooling with cast iron housing (Not for EFI engines)
5.7L GM IB, Beg #B522506 End #B525981.
5.7 GM Ski, Beg #A338553 End #B514626.
Mercruiser T-stat # 59137
5.7L GM IB, Beg #B522506 End #B525981.
5.7 GM Ski, Beg #A338553 End #B514626.
Mercruiser T-stat # 59137
Make sure to use the Mercruiser style thermostat and not an automotive style. If you use an automotive style it will cause the engine to run very cool on the guage but your exhaust manifold's will be very hot.
Bin Number (ISBN): 0700
