Description
The Mishimoto MMOC-GTO-04BK is a 25-row LS1/LS2 front-sump oil cooler kit built as a DIY platform for highly modified LS vehicles. Rather than a bolt-on solution, this kit ships as core components you fabricate custom brackets around, including a CNC-machined oil line adapter that lets you run -AN fittings exactly where your build needs them. In testing, this Mishimoto oil cooler kit dropped oil temperatures by a massive 65°F (36°C), a figure that puts it firmly in race-only territory.
Because of that dramatic cooling capability, Mishimoto designed this cooling kit specifically for race vehicles, turbocharged and supercharged drag applications where oil temperature management becomes critical. The 25-row core gives the system serious surface area to shed heat, while the -AN flare fittings and CNC-machined adapter make it possible to route lines to a custom-mounted location instead of a fixed factory position. As an added functional benefit, running this Mishimoto oil cooler kit increases oil capacity by 1.0 qt, giving your LS engine additional oil volume alongside the extra cooling.
Vehicle Applications
This Mishimoto LS1/LS2 oil cooler kit is built around front-sump LS1/LS2 platforms and is listed for the 2004–2006 Pontiac GTO Base. Because it is a DIY kit requiring custom bracket fabrication, it’s intended for owners of highly modified LS-powered GTOs who need a cooling solution that can be mounted to suit their specific chassis layout rather than a stock location.
Features
- Designed for LS1/LS2 equipped vehicles with a front-sump
- Built for custom or race set-ups
- DIY kit requires custom bracket fabrication to mount the cooler in your desired location
- Proven to reduce oil temperatures by 65°F (36°C) during testing
- Includes a 25-row stacked-plate oil cooler and a CNC-machined, application-specific oil line adapter
- Kit includes a 6-ft stainless steel braided hose with 90° and straight -10AN fittings
- Increases oil capacity by 1.0 qt
- Backed by the Mishimoto Lifetime Warranty
Specifications
- Brand: Mishimoto
- Part Number: MMOC-GTO-04BK
- Core Type: Bar-and-Plate
- Core Row Quantity: 25
- Core Height: 7.32 in
- Core Thickness: 1.97 in
- Core Width: 11 in
- Color: Black
- Finish: Anodized
- Core Color: Black
- Grade Type: Performance
- Inlet Fitting Type: AN Flare, Male
- Outlet Fitting Type: AN Flare, Male
- Engine Codes: LS-1, LS-2
- Chassis Code: V-Body
- Kit Includes: 25-Row Oil Cooler, Mishimoto LS1/LS2 Oil Cooler Adapter, 6-ft Stainless Steel Braided Hose w/ 90° & Straight -10AN Fittings, Banjo Fitting w/ Bolt M20 x -10AN (Black), M20 x -10AN Straight Fitting (Black), Mounting Hardware Set, Mishimoto Lifetime Warranty
Frequently Asked Questions
What vehicles does this Mishimoto oil cooler kit fit?
This kit is designed for LS1/LS2 front-sump applications and is listed for the 2004–2006 Pontiac GTO Base.
How much does this kit reduce oil temperature?
During testing, the kit dropped oil temperatures by 65°F (36°C).
Is this a direct bolt-on kit?
No. This is a DIY kit that requires fabrication of custom mounting brackets to mount the cooler in your desired location on a highly modified LS vehicle.
What is included in the Mishimoto LS1/LS2 oil cooler kit?
The kit includes a 25-row oil cooler, a Mishimoto LS1/LS2 oil cooler adapter, a 6-ft stainless steel braided hose with 90° and straight -10AN fittings, a banjo fitting with bolt (M20 x -10AN, Black), an M20 x -10AN straight fitting (Black), a mounting hardware set, and the Mishimoto Lifetime Warranty.
Is this cooler kit suitable for street driving?
Mishimoto recommends this kit be used on race vehicles only; for street applications, Mishimoto recommends using the Thermostatic Kit instead.
Does this kit change engine oil capacity?
Yes, it increases oil capacity by 1.0 qt.
âš WARNING (California Proposition 65): This product can expose you to chemicals known to the State of California to cause cancer and/or birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.



















