53mm High Performance Thermostat (160 Deg F) 1996-pontiac-firebird-esi1593369 The three-way adjustable SB054 gives

The three-way adjustable SB054 gives you a 73%-125% increase in rate over the stock bar

Please verify whether your vehicle has (1) or (2) upper control arms

Valve Spring Specifications: Type: Non-Rotator Seat Pressure: 110 lbs

High quality die-cast aluminum spin-on adapter with 1/2" NPT dual side ports

53mm High Performance Thermostat (160 Deg F) 1996-pontiac-firebird-esi1593369 The three-way adjustable SB054 givesEdelbrock thermostats are designed to ensure consistent cooling in high performance applications. Feature a brass and copper valve assembly with a stainless steel body for durability. This 160 Deg F thermostat is a bolt on OEM style replacement that measures 53mm.