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Koyorad  |  SKU: HH422675

Koyorad Performance Radiator: BMW M3 E46 3.2L I6 2001-2006

$799.00 AUD
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Koyo Performance Radiator – BMW E46 M3 S54 3.2L I6 MT/SMG 2001–2006

Application: BMW M3 | E46 (Coupe / Convertible / CSL) | S54B32 3.2L I6 | Manual & SMG

Part Number: HH422675 / KH422675


The E46 M3 is widely regarded as one of the finest driver's cars ever produced — a naturally aspirated S54 straight-six that revs freely to 8,000rpm and a perfectly balanced chassis that remains a benchmark for driver engagement. The S54 generates significant heat at high rpm and under sustained track use, making a quality cooling upgrade a worthwhile investment for any E46 M3 owner pushing the car hard.

Koyorad's all-aluminium radiator is a direct bolt-in upgrade for the E46 M3. Nocolok furnace brazed, TIG welded by hand, and triple pressure tested — retains all OEM fan shroud mounts and hose connections with no modifications required.


Why Koyorad?

  • Precise Tube & Fin Alignment — Optimal coolant flow and maximum heat transfer efficiency.
  • Nocolok Furnace Brazing — All components bonded as one unit for vibration and debris resistance.
  • Billet Filler Neck — Precision-machined for strength, durability, and a reliable seal.
  • OE-Specific Mounting — Retains factory fan shroud, hose positions, and mounting pins.
  • Hand-Crafted Heliarc Welds — Individually welded for the strongest possible aluminium-to-aluminium bond.

Specifications

Part Number HH422675 / KH422675
Core Thickness 48mm
Core Dimensions (H x W) 580 x 394/426mm
Tube Pitch 55/55 x 414mm
Inlet / Outlet 38mm top and bottom
Construction All Aluminium, Nocolok Brazed, Heliarc Welded
Transmission Manual & SMG
BMW OEM 1710 2 228 941

Fitment

Year Model Chassis Submodel
2001-2006 BMW M3 E46 Coupe S54B32 3.2L I6 MT/SMG
2001-2006 BMW M3 E46 Convertible S54B32 3.2L I6 MT/SMG
2003 BMW M3 CSL E46 Coupe S54B32 3.2L I6 SMG

Sold individually. Lead times may apply — contact us at ModsDirect for availability and shipping estimates.

ModsDirect is an Authorised Australian Distributor of Koyorad Performance Radiators.

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Koyorad

Koyorad Performance Radiator: BMW M3 E46 3.2L I6 2001-2006

$799.00 AUD

Koyo Performance Radiator – BMW E46 M3 S54 3.2L I6 MT/SMG 2001–2006

Application: BMW M3 | E46 (Coupe / Convertible / CSL) | S54B32 3.2L I6 | Manual & SMG

Part Number: HH422675 / KH422675


The E46 M3 is widely regarded as one of the finest driver's cars ever produced — a naturally aspirated S54 straight-six that revs freely to 8,000rpm and a perfectly balanced chassis that remains a benchmark for driver engagement. The S54 generates significant heat at high rpm and under sustained track use, making a quality cooling upgrade a worthwhile investment for any E46 M3 owner pushing the car hard.

Koyorad's all-aluminium radiator is a direct bolt-in upgrade for the E46 M3. Nocolok furnace brazed, TIG welded by hand, and triple pressure tested — retains all OEM fan shroud mounts and hose connections with no modifications required.


Why Koyorad?


Specifications

Part Number HH422675 / KH422675
Core Thickness 48mm
Core Dimensions (H x W) 580 x 394/426mm
Tube Pitch 55/55 x 414mm
Inlet / Outlet 38mm top and bottom
Construction All Aluminium, Nocolok Brazed, Heliarc Welded
Transmission Manual & SMG
BMW OEM 1710 2 228 941

Fitment

Year Model Chassis Submodel
2001-2006 BMW M3 E46 Coupe S54B32 3.2L I6 MT/SMG
2001-2006 BMW M3 E46 Convertible S54B32 3.2L I6 MT/SMG
2003 BMW M3 CSL E46 Coupe S54B32 3.2L I6 SMG

Sold individually. Lead times may apply — contact us at ModsDirect for availability and shipping estimates.

ModsDirect is an Authorised Australian Distributor of Koyorad Performance Radiators.

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