Holden V8 253 308 Black Twin Outlet Thermostat Housing & 82°C Thermostat

• Housing and thermostat together - everything the water neck job needs in one order
• Twin outlet black water neck for all Holden 253 and 308 V8 motors - heater and bypass hose connections ready
• GASO 82°C high flow thermostat included - 54mm copper and brass thermostat built to open consistently at high RPM

This GASO black thermostat housing features a twin outlet design, making it ideal for Holden V8 engines running additional coolant lines. Precision manufactured for a secure fit, it replaces the factory water neck and features a durable black finish for a clean, performance-focused appearance.

Supplied with the GASO Peak Performance high flow thermostat (GPP-3894), a 54mm conventional flat thermostat that opens at 82°C (180°F). It is built in copper and brass and designed to resist the coolant pressure changes that can affect conventional thermostats at high RPM, so it opens consistently in street, drag racing and oval track use. It interchanges with Mr. Gasket 4364 and Aeroflow AF49-1044.

What you receive

• 1 x GASO black twin outlet thermostat housing (GPP-3878BK), with O-ring and mounting hardware
• 1 x GASO Peak Performance high flow thermostat GPP-3894, 82°C (180°F), 54mm, copper and brass

Housing specifications

• Application: Holden V8 253 and 308 across HT, HG, HQ, HJ, HX, HZ, WB, LC, LJ, LH, LX, UC, VB, VC, VH
• Material: Cast steel with black finish
• Configuration: Twin outlet (heater / bypass ready)
• Includes: Mounting hardware and O-ring supplied

Thermostat specifications

• Brand: GASO Peak Performance
• Part number: GPP-3894
• Type: High-flow engine coolant thermostat, conventional flat design
• Opening temperature: 82°C (180°F)
• Diameter: 54mm
• Construction: Copper and brass
• Interchange: Mr. Gasket 4364, Aeroflow AF49-1044

Fitment

Holden V8 253 and 308 across HT, HG, HQ, HJ, HX, HZ, WB, LC, LJ, LH, LX, UC, VB, VC, VH. Please confirm your housing outlet angle, thermostat diameter and cooling system design before ordering.

This kit uses a conventional 54mm thermostat with no bypass foot. It will not suit Ford Cleveland V8 engines, which need an extended-foot bypass thermostat such as the Dayco DT66A.