Koyo VH061885 Hyper V-Core Radiator for 2006-2015 Mazda MX-5 Miata NC 2.0L MT

Vehicle Fitment

• 2006-2015 Mazda MX-5 Miata Soft Top (NC / NC1 / NC2 / NC3, MZR LF-VE 2.0L DOHC I4, RWD, MT)
• 2007-2015 Mazda MX-5 Miata PRHT - Power Retractable Hard Top (NC / NC1 / NC2 / NC3, MZR LF-VE 2.0L DOHC I4, RWD, MT)

Fitment Notes

• Manual Transmission (MT) primary application. Automatic transmission vehicles require a separate external transmission cooler, as this all-aluminum radiator does not include automatic transmission fluid cooling connections.
• Fits all NC MX-5 Miata trims across all three NC sub-generations (NC1: 2006-2008, NC2: 2009-2012, NC3: 2013-2015), including Sport, Touring, Grand Touring, Club, Special Edition, and PRHT variants.
• Compatible with OEM radiator hoses - no hose replacement required at installation.
• Retains all OEM fan shroud mounts, stock coolant hose positions, and factory mounting locations - no drilling, cutting, or chassis modification required.
• Radiator cap is not included. Verify cap compatibility before installation - a Koyorad SK-C13 deep plunger-style cap is recommended (sold separately).
• Does not fit the 2016+ ND-generation Mazda MX-5 Miata, which uses a separate platform and different radiator application.

Features

• Hyper V-Core Series 36mm two-row high-density core - engineered specifically for vehicles with limited engine bay space and factory inlet/outlet positions that prevent use of a traditional dual-pass N-Flo design.
• Specially engineered fin and tube pitch dramatically increases core surface area compared to a conventional core of the same thickness, delivering superior heat rejection while maintaining strong airflow through the radiator.
• Two-row construction increases coolant volume significantly over the single-row OEM radiator, providing greater thermal reserve for spirited street driving, track days, and forced-induction builds.
• Full aluminum construction eliminates the OEM plastic end-tank / aluminum core design, removing the long-term failure points of plastic tank cracking, warping, and seal degradation inherent to the factory unit.
• Direct bolt-in fit with OE-specific mounting locations for all fan shrouds, inlet and outlet hoses, and upper and lower mounting pins - true plug-and-play installation.
• Nocolok furnace brazing bonds all tubes, fins, headers, and tank brackets for long-term resistance to vibration, sustained high-temperature heat cycling, and road debris impact.
• Hand-crafted Heliarc (TIG) welds on every radiator produce the strongest possible aluminum-to-aluminum bond at all tank-to-core junctions.
• Triple pressure tested during manufacturing to verify structural integrity and confirm zero leaks before leaving the factory.
• Precision-machined billet aluminum filler neck provides a superior seal and long-term durability versus the OEM plastic filler neck.
• Manufactured in Koyorad's privately owned, ISO 9001-certified Japanese facilities with in-house quality oversight at every stage of production.

Specifications

• Part Number: VH061885
• Series: Hyper V-Core (VH Series)
• Core Thickness: 36mm (1.41")
• Core Height: 16.49"
• Core Width: 22.04"
• Core Type: Two-row, high-density Hyper fin and tube pitch
• Material: Full aluminum construction - tanks, core, filler neck
• Filler Neck: Billet aluminum, precision-machined
• Brazing Method: Nocolok furnace brazed
• Welding Method: Hand TIG (Heliarc) welded
• Pressure Testing: Triple pressure tested
• Hose Compatibility: OEM coolant hoses retained
• Radiator Cap: Not included - Koyorad SK-C13 recommended (sold separately)
• Transmission Compatibility: Manual Transmission (MT) primary; AT requires external cooler
• Drivetrain: RWD
• Weight: Approximately 12.7 lbs
• Platform: Mazda NC MX-5 Miata (NC1 / NC2 / NC3, 2006-2015)
• Engine: MZR LF-VE 2.0L DOHC Inline-4

Included Components

• 1x Koyo VH061885 Full Aluminum Hyper V-Core Radiator

Product Description

The Koyo VH061885 is a 36mm full-aluminum Hyper V-Core Series radiator engineered for the full production run of the third-generation Mazda MX-5 Miata NC platform - covering all 2006-2015 model years and all body variants including Soft Top and the PRHT (Power Retractable Hard Top) introduced for 2007. This radiator fits all NC sub-generations (NC1 2006-2008, NC2 2009-2012, NC3 2013-2015) and all trim levels including Sport, Touring, Grand Touring, Club, and Special Edition, all equipped with the MZR LF-VE 2.0L DOHC four-cylinder engine and a manual transmission. This part does not fit the 2016+ ND-generation MX-5 Miata, which uses a different platform and requires a separate radiator application.

The VH061885 is part of Koyorad's Hyper V-Core lineup - a series developed specifically for modern vehicles where tight engine packaging and fixed factory inlet/outlet positions make a traditional N-Flo dual-pass design impractical. Rather than relying on extended coolant dwell time through multiple passes, the Hyper V-Core achieves its thermal advantage through a purpose-engineered two-row fin and tube geometry that substantially increases core surface area over both the OEM radiator and a conventional single-pass aluminum replacement. Good-Win Racing, one of the most respected NC MX-5 specialists in the US, developed the VH061885 alongside Koyo using their own "Winning Blue" 2006 Miata project car and notes it provides nearly three times the coolant capacity of the OEM radiator - a claim consistent with the two-row construction replacing the factory's single-row plastic-end-tank unit.

Installation requires removal of the front nose section to access the radiator, which sits deep in the NC's chassis - a process that most owners will want completed by an experienced shop. Once in place, the VH061885 is a true bolt-in fit: all OEM fan shroud mounts are retained, stock coolant hoses are reused, and no chassis modification is required. The radiator does not include connections for automatic transmission fluid cooling, so automatic transmission owners must add a separate external transmission cooler. The radiator cap is not included - a Koyorad SK-C13 or equivalent cap is recommended. Every unit is Nocolok furnace brazed, hand Heliarc TIG welded, and triple pressure tested at Koyorad's ISO 9001-certified facilities in Japan, making the VH061885 a proven, long-term cooling solution for stock NC Miatas and modified builds alike.