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Pontiac GTO Performance Aluminum Radiator, 2004

Pontiac GTO Performance Aluminum Radiator, 2004
Pontiac GTO Performance Aluminum Radiator, 2004
Pontiac GTO Performance Aluminum Radiator, 2004

Regular Price: $546.00

Sale Price $409.95


  • Your vehicle requires 2 bottles of full strength coolant or 4 bottles of premixed coolant.
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Installation Difficulty

  • Direct fit for the 2004 Pontiac GTO
  • Reduces coolant temperatures by +15°F (+6°C)
  • Large two-row brazed aluminum core increases fluid capacity by 0.64 L and provides ideal coolant temperatures on and off the track
  • All-aluminum construction with TIG-welded end tanks provides optimal heat dissipation and reliability
  • Applicable for both manual and automatic vehicles
  • Includes magnetic drain plug
  • Mishimoto Lifetime Warranty

Treat your modern muscle car to a dose of reliability with the Mishimoto Pontiac GTO Performance Aluminum Radiator. This radiator is engineered specifically for the 2004 Pontiac GTO with efficient cooling in mind. For optimal heat dissipation and reliability, this radiator features an all-aluminum construction, including TIG-welded end tanks and a fully brazed 2-row core. This large, efficient, and robust core provides an increase in capacity of 0.64 L and a reduction in coolant temperatures of +15°F (+6°C), making it ideal for use on and off the track. This radiator features an in-tank transmission fluid cooler compatible with stock transmission cooler lines, making this a true bolt-in performance radiator. This radiator also includes the Mishimoto Magnetic Oil Drain Plug M12 x 1.5 which removes any metal fragments from your coolant system. Whether you are making a pass down the strip or kicking the back tires out at an autocross, our radiator will keep your GTO cool. As with all our products, this aluminum radiator includes the Mishimoto Lifetime Warranty, ensuring superior product quality and craftsmanship.

Mishimoto Automotive (“Mishimoto”) warrants its products under this lifetime limited warranty policy (“Warranty Policy”). This Warranty Policy applies solely to: (i) Mishimoto Products purchased directly from Mishimoto or Mishimoto authorized dealers (each a “Mishimoto Product” and collectively, the “Mishimoto Products”) and (ii) the original purchaser of such Mishimoto Product (“Purchaser”). This Warranty Policy is non-transferable and all claims under this Warranty Policy must be accompanied by the original sales receipt. The terms and conditions of this Warranty Policy are subject to change by Mishimoto at any time without notice.

For our complete warranty policy, please click here.



Material Aluminum

Note This item is for manual and automatic transmission vehicles.

Due to the added thickness of the Mishimoto radiator, the clip securing the radiator cover to the electric fan shroud will need to be trimmed for proper fitment. The remaining clips securing the radiator cover to the core support will sufficiently secure it in position.

Engine Codes LS-1 (5.7L)

Fits 2004 Vauxhall Monaro (5.7L Engine Only)
2001–2004 Holden Monaro (5.7L Engine Only)

Overall Height 32.6"

DPI 2754

Drain Plug Length 1.5mm

Drain Plug Thread Size (M12)

Overall Length 18.65"

Tank Wall Thickness 0.08"

Outlet 1.375"

Rows 2

Inlet 1.375"

Coolant Capacity 3.58

Dual Pass False

Purchase Includes Mishimoto Radiator
Magnetic Drain Plug
Mishimoto Lifetime Warranty

Overall Width 5.55"

Core Length 26.55"

Core Height 17"

Core Thickness 1.96"

Overall Length (in) 18.65

Overall Height (in) 32.60

Overall Width (in) 5.55

Rows 2

Engineering Blog

2004–2006 Pontiac GTO Performance Aluminum Radiator Development

2004–2006 Pontiac GTO Performance Aluminum Radiator Development

May 23, 2020

Want to see all the product details? Check out our product page linked below! Mishimoto Pontiac GTO Performance Aluminum Radiator Product Introduction and Goals Our team has received numerous requests for a reasonably priced, high-performance aluminum radiator for the new-age Pontiac GTO. After reviewing the project and evaluating the current offerings available, we found a … Continue reading 2004–2006 Pontiac GTO Performance Aluminum Radiator Development →

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