Mishimoto MMRAD-STI-08 Performance Aluminum Radiator Fits Subaru Impreza WRX/STI 2008-2014

Had to replace the stock radiator after the fittings fell apart in my hand (140k miles). This radiator cooled my running temps during the summer by 10-15 degrees and has a much faster recovery time. The only difficulty in installation was that the fan mountings are about 1/8” off on a few bolts (don’t use a drill on the fan shroud, it will shatter, use a file). Otherwise, a great product that I would highly recommended over stock. I usually stay with OEM parts for everything, but this is so much better. Don’t wait, replace yours before it fails at an inconvenient time.

Package shipped quick and the install was easy and straight forward. The radiator is solid quality, just make sure to burp it thoroughly. If you are swapping the upper or lower radiator hoses, you may need to trim them down a bit since this radiator is a bit wider than the oem one.

Excuse the bad joke above; seriously though, this radiator is nice. I bought this radiator because my 08 WRX was leaking (turns out the plastic drain port on the stock radiator was on the verge of crapping out.) The Mishimoto is an upgrade and happened cost less than an OEM radiator, a big plus. This is also full aluminum which means that unlike the stock radiator, which is plastic and aluminum, everything heats and cools at relatively the same time meaning it's less likely to leak if properly installed. This radiator is thicker and will require some finagling in order to put it in, but its really not a very difficult job. I think it would fit without cutting original hoses, but I ended up cutting about an 1/8 to 1/4 in off some hoses in order to make everything fit nicer. Overall, I'm very pleased with Mishimoto.

Coolant system leaked about a month after installation; called customer service to inquire about warranty replacement should it have been the radiator that failed. Spent about five seconds on hold before helpful service representative walked me though the warranty claim process which seems very straightforward. Fortunately the radiator itself was not directly at fault.Radiator is very nearly direct fit in the 2005 Legacy GT engine bay; it does require some modification to (in particular) the upper radiator hose. However, clearance on the upper hose is very close to the stock fan, and the leak was ultimately caused by the fan wearing a small hole into the upper hose even though it seemed clear when the system was cold. Going to attempt to reinstall with low-profile fan shroud kit which should help.

I was in a rush to replace the stock 2010 Impreza WRX Radiator due to the upper hose inlet failing. Well pretty much since install (2021) this Mishimoto Radiator has been nothing but troubles and I haven't replaced it yet but the drain plug just leaks and leaks and leaks, drip by drip..Searched some online forums and it seems to be a manufacturing defect with certain batches which I presume mine is a part of. I wasn't rich in 2021 and still not but now making a good living so I've went back to tend and care for my WRX.Resolving issues one by one, now I'm finding myself in a rut due to this poorly constructed radiator that cost's way more than it's worth in my opinion and I'm a machinist. Everything from the welds to the core and threads plus the ports are terribly machined and fabricated. At the time I fell for the "Lifetime Warranty" aspect, which I find hard to even succeed in establishing any remedy with this company. I purchased hoses as well which have recently failed also..Steer clear and fork the dough for a more reliable and well made product versus this garbage. Never again Mishimoto..

Came really quick, actually came the next day after i ordered which was earlier from the expected arrival time. was nicely packaged item was safe during transport. as the the quality it self is good. looks very nice and shiny. well built. The install was easy no issues with it. although if you using the factory hose on the top. i had to cut about half a inch off it because the rad is a lot thicker then the stock one so the hose was to close to the alternator. which with the engine rock on hard acceleration the engine could rock enough to slice the hose. but that's a easy mod or you can buy the hose kit from Mishimoto. Other wise the performance is good. Car sits around 180-190F as before it would be around 200-206F. product works well and looks very nice and solid in the engine bay.

Pretty straight forward install in my 08 wrx hatch. Have yet to fill and see if there’s any internal leaks but will report if I find any issuesUpdate- the fitting I pictured that was included was leaking. The thread on it was a tad loose that tightening it would just strip the thread so I added a good amount of Teflon tape and a washer at the end. No more leaking. Overall it’s still a very good radiator

Replaced OEM radiator on 08 WRX as it was leaking from top where plastic meets metal, gauge seems to run a little lower than before, and measured temps with Cobb AP and it never went above 195, great fitment, very worthwhile upgrade if your pushing more power than stock.