About this guide
The R32 Skyline GT-R’s RB26DETT is a twin-turbo inline-six that runs hot under sustained load, which is why the aftermarket aluminum radiator market for this chassis is mature and deep — these are all direct-fit replacements for the stock plastic-tank OEM unit, no cutting required. Core thickness is the real selection axis here, not just brand: a 36mm core is fine for a stock-power street car, 42-48mm covers most street/big-single builds, and 53mm+ or a side-flow design is for sustained track use or a serious drift build pushing well past stock boost. We also checked Fluidyne, Griffin, HKS, and Blitz on the coordinator’s suggestion — Fluidyne and Griffin don’t appear to offer an R32-specific core, HKS sells radiator caps for the R32 but not a full radiator, and we found no current Blitz R32 radiator listing, so none of those four made the list; Ron Davis made an R32 radiator in the past but no longer lists one as a standard catalog item (custom-order only per their own forum guidance), so it’s mentioned here rather than included as a buyable pick.
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The picks, in detail
Koyo HH Series Aluminum Radiator (HH020214)
Koyo's high-fin-density 53mm-core racing radiator, a direct-fit replacement engineered specifically for the R32 GT-R's manual-transmission RB26DETT — the thickest core on this list short of the side-flow ARC option.
- 53mm core
- High fin density for heat dissipation
- Direct-fit, no cutting required
- 1/8″ NPT accessory port for temp sensors
- Decades-long reputation in the Skyline scene with extensive track-proven use
- Priced above Mishimoto for a similar performance tier
Mishimoto Performance Aluminum Radiator (MMRAD-RHD-R32)
A lightweight dual-core direct-fit radiator claimed to improve cooling efficiency up to 30% over stock, with a lifetime warranty — a solid choice for a stock-to-mildly-modified street car.
- 100% brazed aluminum construction
- Dual-core design
- Direct OEM fit
- Lifetime warranty
- Lifetime warranty backing is a genuine differentiator versus most competitors on this list
- Slightly less thermal capacity in independent core-size comparisons than Koyo’s 53mm-core HH series
CSF High-Performance Radiator (7229/7229B)
CSF's standard (non-billet) 2-row 42mm-core radiator for the R32 — a mid-tier upgrade over stock without the full-billet price of CSF's flagship 7217.
- 2-row 42mm core
- High-performance aluminum construction
- Sits in a genuine middle price tier between Mishimoto/Koyo and CSF’s own full-billet 7217
- Less core capacity than Koyo’s 53mm HH series at a similar price point
CSF Full Billet High-Performance Radiator (7217/7217B)
A 2-row 42mm-core radiator using CSF's proprietary B-Tube technology and CNC-machined billet end tanks — the premium/big-power tier of CSF's R32 lineup.
- 2-row 42mm core
- B-Tube technology
- CNC-machined billet end tanks
- B-Tube core design is a genuine technical differentiator from the round/oval-tube cores most competitors use
- Priced well above Koyo, Mishimoto, and CSF’s own standard 7229 at MSRP
PWR 42mm R-Fin Radiator (PWR0943)
An Australian-engineered performance radiator built with PWR's race-proven R-Fin core technology, aimed at track and big-single-turbo builds.
- 42mm core
- R-Fin core technology
- Direct-fit for R32 GTR/GTS-T
- Race-pedigree brand with a strong reputation in Australian and Japanese performance-car circles
- Sourced mainly through Australian/international importers rather than US retailers, which adds shipping cost and lead time
GReddy Trust TW-R Aluminum Radiator (12023802)
A thicker-than-stock wide-tube twin-core radiator from GReddy's Trust-produced TW-R line, built to secure more coolant capacity and cut pressure loss versus the factory unit.
- Full aluminum wide-tube twin-core construction
- Thicker than the factory core
- Direct-fit for BNR32
- Established Japanese performance-cooling brand with a long RB26 track record
- Imported from Japan — expect higher shipping cost and lead time than the US-stocked brands here
ARC Brazing Radiator SMC36 (1N014-AA070)
ARC's stock-replacement-tier radiator for the BNR32, with the thinnest core on this list — a genuine budget/street option from a respected Japanese cooling specialist rather than a step-up performance part.
- 36mm core
- Stock-replacement configuration
- Direct-fit for BNR32
- Thinner, lighter core than every other option here — a sensible pick if you just need a healthy factory-spec replacement, not a power upgrade
- 36mm core has the least thermal margin on this list for anyone adding real boost
ARC Brazing Radiator SMC55 Side-Flow (1N014-AA071)
ARC's upgraded side-flow radiator with a thicker core than the SMC36 for sustained cooling under big power or drift-duty use.
- 55mm-class core
- Side-flow configuration
- Direct-fit for BNR32
- Side-flow design plus the thickest core in ARC’s own lineup — built specifically for higher sustained heat loads than the stock-replacement SMC36
- Among the most expensive options on this list
Nissan Nismo OEM Radiator Assembly
The factory-correct replacement radiator assembly for builds prioritizing numbers-matching originality or stock reliability over aftermarket cooling capacity.
- Factory OEM/Nismo-spec configuration
- Direct bolt-in fit
- The only option here that keeps a stock or numbers-matching-focused build factory-correct
- Highest price on this list, and no thermal-capacity advantage over the aftermarket performance radiators here for a modified car
What each one costs
Typical price, cheapest first. Tap a name to jump to that pick and its buy link.
Compare any three
| Koyo HH Series Aluminum Radiator (HH020214) | Mishimoto Performance Aluminum Radiator (MMRAD-RHD-R32) | CSF High-Performance Radiator (7229/7229B) | |
|---|---|---|---|
| Price | $350-$465 | $320-$415 | $500-$600 |
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Buying tips
- Match the core to the build, not just the budget: a 36mm core (ARC SMC36) suits a stock-power street car, 42mm (Mishimoto, CSF 7229/7217, PWR) covers most street and mild-boost builds, and 48-53mm+ or a side-flow design (Koyo HH, ARC SMC55) is for sustained track use or a big-single/drift-duty car running well past stock boost.
- Koyo and Mishimoto sit in the same practical performance tier at similar prices — the deciding factor is usually warranty (Mishimoto’s lifetime warranty) versus track reputation (Koyo’s longer history in Skyline racing).
- Imported options (PWR, GReddy Trust) add real shipping cost and lead time on top of the sticker price — factor that into the comparison against US-stocked Koyo, Mishimoto, CSF, and ARC.
- All of these are direct-fit for the R32 GT-R’s factory mounting points, but double-check whether your car is manual or auto transmission before ordering — some listings are transmission-specific.
As an Amazon Associate and eBay Partner, toptenpick.com earns from qualifying purchases. Prices and availability are subject to change.