Mishimoto MMRAD-DMAX-06 Aluminum Performance Radiator

PART# MMRAD-DMAX-06 | SKU MIMMRAD-DMAX-06
★★★★★ ★★★★★ 4.2 (4 Reviews)

Vehicle Fitment For:
2006-2010 GM 6.6L Duramax LBZ/LMM

See full application list below
$999.95

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Estimated ship date: 06/09/2026 (if ordered today)
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Description

The Mishimoto MMRAD-DMAX-06 Aluminum Performance Radiator is a direct-fit replacement for the leaking radiator in your GM 6.6 Duramax LBZ/LMM. This performance radiator is manufactured from aircraft-grade aluminum with a 100% brazed aluminum core and polished end tanks for good looks. Offering increased cooling efficiency, this all-aluminum TIG-welded radiator provides a durable design that is perfect for the street or the racetrack. This Mishimoto Aluminum Performance Radiator retains stock mounting points and requires no modification for installation. As with all Mishimoto products, this radiator is covered by the Mishimoto exclusive lifetime warranty.

Features:
  • Direct-Fit Replacement
  • Aircraft-Grade Aluminum
  • 100% Brazed Aluminum Core
  • Lifetime Warranty
Note: This radiator was designed to fit with the most updated lower hose from Chevrolet/GMC with a larger O-ring. 2006-2007 model-year owners will need to purchase the Mishimoto radiator hose kit or the 2008-2010 OEM lower hose (part #25841843) from Chevrolet/GMC.
Tech Specifications:
Overall Size: 45.1 x 24.8 x 5.9
Core Size: 33.86" x 23.54
Rows: 2
Inlet: 1.81
Outlet: Factory-Style Quick Disconnect
Core Thickness: 2.21
Tank Wall Thickness: .08
Drain Plug Thread Size: M12 x 1.5
Manufacturer Warranty*:
Limited Lifetime

Instructions & Tech Info

Installation Info
Customer Average
3 Hours

MIMMRAD-DMAX-06 Installation Video

Reviews For Mishimoto MMRAD-DMAX-06

Overall Rating
4.2/5
4 Reviews
Rating Snapshot
5 ★
3
4 ★
0
3 ★
0
2 ★
1
1 ★
0
Verified Buyer
★★★★★ ★★★★★
mishimoto radiator
michael (UT) | March 27th, 2026
The radiator fit in perfect. I did have to take off my hot pipe and intercooler pipe off to put it in, but I would definitely recommend it to anyone who is looking for a great upgrade. I would also encourage everyone to get the Mishimoto transmission cooler lines, as it was easy to install
Verified Buyer
★★★★★ ★★★★★
Don't know why it gets bad reviews
Joe schmo (Washington) | April 27th, 2024
I read that the transmission cooler lines are smaller than stock and need adapter and that this gets damaged easily in shipping. I was nervous about ordering an almost 1000 dollar radiator but it showed up perfect. It was packaged very well. It was wrapped in cardboard then put in a bigger box with large foam corners and all the rest of the space was filled with paper padding. If it gets damaged in shipping it's because someone wanted to damage it. It fit in the truck very well the cooler lines were the same size as stock for the LBZ. The only modification I had to make was to the lower fan shroud has tabs that go into the radiator and they needed to be filed down to fit.
 
★★★★★ ★★★★★
Radiator exchange
Jamie B (Umatilla Fl) | April 18th, 2021
Fit as specified. The hose (note) was overlooked which caused a slight delay but it was a local item. I haven’t pulled my 5th wheel yet but I’m looking forward to the sustainable cooler temperatures.
 
★★★★★ ★★★★★
cools good, terrible first experience
Mark Gertner (United States) | November 28th, 2013
This is a really great radiator and cools very well. Unfortunately I'm on my first radiator the fans have already got cracks on the brazing to the tank on the drivers side. I have called and told them and am going to be expecting my money back.
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Frequently Asked Questions

Is there a high capacity radiator for the 2005 LLY Duramax?

We offer the Mishimoto MMRAD-DMAX-01 Aluminum Performance Radiator for the 2001-2005 GM 6.6L Duramax LB7/LLY. Click Here




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More to Consider

Specifications For Mishimoto MMRAD-DMAX-06

MPN MMRAD-DMAX-06
SKU MIMMRAD-DMAX-06
GTIN 748666005013
ID 17802
Manufacturer Name Mishimoto
Shipping Weight 15.00 lb.
Shipping Length 7 in.
Shipping Width 33 in.
Shipping Height 37 in.
Fuel Type Diesel
Manufacturer Warranty* Limited Lifetime
Prop 65 Prop 65 WarningWARNING: Cancer & Reproductive Harm - P65Warnings.ca.gov
Internal L0R0

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