Dual Pass Radiator 19x31 with 1/4in Bung

The Dual Pass Radiator 19x31 with 1/4in Bung from ALLSTAR PERFORMANCE is engineered for high-performance cooling in street, strip, and road-race applications where engine bay real estate demands compact efficiency. This aluminum radiator is the go-to choice for enthusiasts upgrading aging cooling systems or building custom hot rods, late-model muscle cars, and modified street machines that require reliable thermal management without sacrificing underhood aesthetics. The dual-pass design maximizes coolant dwell time through the core, delivering superior heat rejection compared to single-pass units of comparable size.

Dual-pass flow architecture routes coolant in two stages through the radiator core, allowing longer contact time with cooling fins and extracting more heat per gallon of fluid circulated—critical when running higher compression ratios, turbochargers, or superchargers where conventional cooling falls short. The 19x31 core size balances compact dimensions (23.1 x 7.55 x 34.7 inches) with effective surface area, making it ideal for tight engine compartments common in restorations and custom builds. The 1/4-inch bung provision allows integration of auxiliary cooling accessories such as transmission coolers, oil coolers, or custom heater-bypass plumbing, giving fabricators flexibility in system design without requiring extensive radiator modification.

Mechanics and fabricators choose the ALLSTAR PERFORMANCE Dual Pass Radiator 19x31 when OEM units prove inadequate for modified engines or when original radiator mounts and dimensions are constraints. Its 17.5-pound construction is lightweight enough for independent suspension conversions and engine swaps where weight distribution matters, yet robust enough to handle sustained high-RPM operation at track events. Verify lower and upper hose fitting sizes and coolant system pressure rating against your application before ordering; proper inlet/outlet orientation and thermostat selection ensure maximum cooling efficiency and prevent air pockets that compromise performance.