MMRAD-MUS-05 Performance Aluminum Radiator Compatible With Ford Mustang 2005-2014

I wasn't sure about buying this radiator for two reasons: 1) I'd never used any of their products and nobody I knew had them, and 2) it said "manual only" and I have a built 5R55S. It was only after talking with my uncle, who's been building cars, hot-rods and working on exotics all his life, that I paid closer attention to Mishimoto, as he recommended them. I don't take anything he recommends lightly given what he works on and his experience. The radiator came in and looked great! I was expecting to have to fabricate some kind of mount for my stock transmission cooler (I run a compound cooler setup with the stock cooler in line with an aftermarket Derale cooler to keep my built 5R55S under control). Immediately after taking it out of the box and bag I saw that it had exactly the right mounts already on it for the stock trans cooler! I get that some radiators for automatic cars are a combined unit with the trans cooler and radiator as one unit...but that's not the case with the S197 mustangs (at least) so listing this as "manual only" was confusing at least. I almost didn't buy this radiator because of this. As for the radiator itself, it went in perfectly. It doesn't have the bulky extra plastic on the sides sticking out so it was even easier to get into place than the stock radiator. Only one of the holes (the top driver-side condenser hole) was off by about half the width of an M6 bolt, but that wasn't anything difficult to correct. I got this radiator because I had to completely rebuild my coolant system among other things. As it stands I'm still putting the car back together so haven't run it yet, so I don't have any feedback on cooling performance. I have no reason to suspect it would be any less than the stock unit at the very least. Very nice drain plug and fittings. One thing I will say is that upon arrival the radiator had a tiny amount of metal flake and "fuzz" inside, but no mechanic worth their salt would think of putting a new radiator into a car without flushing it first anyway.

So far I am really enjoying the performance of this radiator. I purchased a car that had one installed, and it had a slight leak. Tried to replace with a factory like replacement. That radiator came leaking from factory on the plastic side (hairline fracture). Decided to order and replace again back to Mishimoto. Now enjoying the benefits of lifetime warranty. Product is very well build and car runs perfect with it installed. Happy I decided to stick with this brand and would recommend. Also is a direct fit replacement, so very easy to configure.

Update June 2023: Failed after 4 years 82,500 miles. Radiator started leaking where the side tank and the fins attach to each other. I drove the vehicle for about a month with the leak. The size of the leak grew rapidly. I stopped driving the Mustang and parked it in my garage and started putting miles on my Tesla. Fast-forward to November 2025. I am about to submit a warranty claim to replace the radiator. There is a shipping fee and an additional fee totaling about $75 that must be paid before a new radiator will be shipped under the lifetime warranty. I will update this review once I recieve my replacement unit. I am only going to deduct a single star from the previous 5 star rating, contingent upon a hassle-free warranty experience. Original 2019 Review: Fits perfectly. Installed in my automatic transmission 2005 V6 Mustang. Despite Mishimoto claiming it fits manual transmission cars only, I ordered it anyway after doing some research. Turns out automatic 05 and newer Mustangs use a seperate trans cooler that sits between the radiator and AC condenser. V6 or GT, Manual or Automatic, it doesn't matter. They all share the same radiator. No modifications were required whatsoever, it dropped right in although it was a bit tight squeezing it in without bending any fins. COOLING PERFORMANCE IS SLIGHTLY BETTER THAN STOCK. I COMMUTE ON THE INTERSTATE EVERYDAY. CRUISE CONTROL SET TO 70 MPH I ASCEND A LONG UPHILL STRETCH FOR A SEVERAL MILES, AC ON, ABOUT 92°F AMBIENT. I LIKE TO MONITOR MY ENGINE PARAMETERS ON MY SCANTOOL WHEN DRIVING. I WATCH THE COOLANT TEMP CLIMB FROM THE NORMAL CRUISING TEMP OF 192° (NO HILL) UP TO 218° (LONG HILL AND 90+° OUTSIDE) AT WHICH POINT THE COOLING FAN TURNS ON BRIEFLY AND BRINGS THE TEMP BACK DOWN TO 192° THEN IT SHUTS OFF AND ALLOWS THE TEMP TO CLIMB BACK TO 218° REPEATING THIS PROCESS 3 TIMES BEFORE REACHING THE SUMMIT. INTERESTINGLY AFTER THROWING OUT THE 14 YEAR OLD, DIRITY STOCK RADIATOR AND INSTALLING THIS MISHIMOTO RADIATOR I STILL SEE ALMOST THE EXACT SAME ROUTINE BEFORE REACHING THE SUMMIT. DIFFERENCE IS ABOUT 1 MILE FURTHER UP HILL BEFORE THE FAN COMES ON. FAN STILL CYCLES 3 TIMES ALTHOUGH THE THIRD TIME IS NOT AS NEEDED AS IT WAS BEFORE. I IMAGINE THE AIRFLOW THROUGH THIS THICKER RADIATOR IS PROBABLY MORE RESTRICTED AND TO ME EXPLAINS WHY THE PERFORMANCE DIFFERENCE IS NOT GREATER. I'M STILL VERY HAPPY I INSTALLED THIS RADIATOR THOUGH AND WOULD AGAIN IF I HAD ANOTHER CAR TO PUT ONE IN. QUALITY IS THE BEST, AND LIFETIME WARRANTY

So I got this needing to upgrade from the stock radiator in my mustang. This one was pretty straight forward to put in. I will say though because I was looking for this info when I bought this particular one. It says it only works for Manual tranny. It will work for yours if you have an automatic and use the stock tranny cooler thats already on the car. It actually has a slot on it where it lines right up. Saves having to send the universal one back as I did.

Took a little wiggling to install, but to be expected as it is much thicker and higher capacity than stock. All mounting holes and tabs lined up quite well. Great looking construction and a worthy upgrade.

2005 Lincoln LS 3.9L V8 I don’t know if it will fit the 4.6 V8. But I would imagine it would. The mustang uses the same stock radiator as the Lincolns. And if you have a Lincoln LS you know they have, over heating problems. I bought this and a tuner to be able to make the fans turn on at a lower temp and it help a lot it decreased the temp from 215(+) to around 195. And it could go down more if you get a better front end to increase air flow.

The garage mechanic said today this radiator is the best they've seen and fitted. I couldn't really say the exact words, but along the lines of "this is the dogs doodars! 3 times deeper than the original. My Mustang is 100% better for this radiator.

Never would I have believed I could get a radiator for a non native car delivered next day. The radiator was perfect. Exactly if it had been ordered steaming from the manufacturer. A lovely piece of kit I’m just sad it isn’t very visible. Top work. Thank you.