Mishimoto MMRAD-300ZX-90T Aluminum Radiator 1990-1996 Nissan 300ZX TT Z32 Manual

Vehicle Fitment

• 1990-1996 Nissan 300ZX Twin Turbo (Z32, VG30DETT 3.0L Twin Turbo V6, Manual Transmission, RWD)

Fitment Notes

• This radiator is designed for manual transmission 300ZX Twin Turbo models only. It does not include an integrated automatic transmission fluid cooler. Owners of automatic transmission 300ZX models will need to source a separate universal transmission cooler - Mishimoto's Universal Transmission Cooler Kit is a compatible option.
• Fits the turbo (VG30DETT) variant only - does not fit the naturally aspirated 300ZX (VG30DE). The turbo and NA models use different radiator mounting points and hose routing.
• Radiator style: Crossflow - upper passenger-side inlet, lower driver-side outlet. Verify your hose routing matches before purchase.
• Drain plug thread size: M12 x 1.5. Coolant capacity: 2.69 gal.
• Installation difficulty rated Medium. Installation is direct OEM fit - no cutting or modification to the chassis or engine bay required.

Features

• Direct OEM-fit performance aluminum radiator engineered specifically for the 1990-1996 Nissan 300ZX Twin Turbo (Z32) - engineered to maximize cooling efficiency by up to 30% over the stock radiator while maintaining the factory mounting geometry for a no-modification installation.
• Full aluminum construction with TIG-welded end tanks and a 100% brazed aluminum dual-row core - aluminum dissipates heat more efficiently than the OEM copper/brass construction and weighs substantially less, reducing unsprung hood-line weight.
• Two-row, 2.05-inch thick brazed core provides increased coolant volume and heat transfer surface area over the OEM unit, delivering meaningful reductions in coolant temperatures during sustained hard driving, hot weather, and track use - conditions where the stock 300ZX TT cooling system is known to be stressed.
• Brazed core construction - as opposed to welded or soldered - provides minimal joint distortion, low thermal stress at the joints, and clean, structurally consistent tube-to-fin bonds across the full core area.
• Polished aluminum end tanks provide a clean, premium underhood appearance that complements the 300ZX engine bay.
• Includes a 1.3 bar high-pressure radiator / bleeder cap that raises the effective boiling point of the coolant, increasing the thermal headroom of the cooling system and reducing the risk of coolant boilover under sustained high-temperature driving.
• Includes a magnetic drain plug that captures ferrous metallic particles and debris that accumulate in the cooling system, preventing them from circulating through the radiator core and water pump.
• DPI: 1151. Backed by the Mishimoto Lifetime Warranty.

Specifications

• Overall Dimensions: 20.2 in (L) x 27.2 in (H) x 2.55 in (W)
• Core Dimensions: 19.68 in (L) x 18.31 in (H) x 2.05 in thick
• Rows: 2
• Inlet: 1.4 in (upper passenger side)
• Outlet: 1.4 in (lower driver side)
• Radiator Style: Crossflow
• Coolant Capacity: 2.69 gal
• Drain Plug Thread: M12 x 1.5
• DPI: 1151
• Engine Code: VG30DETT
• Chassis Code: Z32
• Transmission Cooler Included: No

Included Components

• 1x Mishimoto performance aluminum radiator
• 1x 1.3 bar bleeder / high-pressure radiator cap
• 1x Magnetic drain plug (M12 x 1.5)
• Mishimoto Lifetime Warranty

Product Description

The Mishimoto MMRAD-300ZX-90T is a direct OEM-fit performance aluminum radiator engineered for the 1990-1996 Nissan 300ZX Twin Turbo with the VG30DETT 3.0L twin-turbocharged V6 and manual transmission. The Z32 Twin Turbo is one of the great sports cars of its era - with 300 horsepower from the factory, compound-turbocharged V6, all-wheel steering, and a chassis architecture that made it genuinely competitive against European sports cars of the period. The cooling system, however, reflects its age: the OEM copper/brass radiator provides adequate cooling in normal driving but struggles under sustained hard driving, hot ambient temperatures, or any increase in power output from the already-stressed twin-turbocharged engine. The margin between stock and overheating is narrow enough that a cooling system upgrade is among the highest-priority reliability modifications for any Z32 TT owner.

Mishimoto's aluminum radiator replaces the stock unit with a dual-row, 2.05-inch thick 100% brazed aluminum core in a TIG-welded aluminum housing, engineered to maximize cooling efficiency by up to 30% over the OEM radiator. The brazed core construction - used in preference to welded or soldered methods - produces consistent, low-stress tube-to-fin joints with minimal distortion, providing both superior structural integrity and optimal heat transfer across the full core surface. The polished aluminum end tanks are TIG-welded for durability and provide a premium underhood appearance appropriate for the Z32's well-regarded engine bay aesthetics. The radiator installs in the OEM position with no chassis modification or hose fabrication required.

The kit includes a 1.3 bar high-pressure bleeder cap that raises the effective boiling point of the cooling system above the stock cap's pressure rating, providing additional thermal headroom during track and performance use. A magnetic drain plug is also included to capture ferrous metallic debris from the coolant circuit, protecting the water pump and core from abrasive particle circulation. This radiator is designed for manual transmission 300ZX TT models - the automatic transmission variant requires a separate transmission cooler, as this radiator does not include an integrated ATF cooler circuit. Verified manual transmission Z32 TT fitment only. Covered by the Mishimoto Lifetime Warranty.