IAG Triple Pass Competition Series 55mm Radiator for 2008-14 Subaru WRX, 08-21 STI

Picked up the 55mm Competition Series Radiator to replace a radiator from a commonly used competitor and I am extremely happy with the results on my 2017 STI!

The Situation:
My previous radiator had worked great on the stock block w/ full bolt-ons at 472whp. Temps would stay under 190*f most of the time and under 210*f in 100*+ weather during traffic at sea level (and not driven aggressively). This unfortunately wasn't the case when switching to a built long block, Killer B headers, rotated turbo, and north of 600whp. Temps would hover in the high 190*s/mid 200*s in cool weather and frequently be in the 218*-230* range when exposed to the same 100* temps at highway speeds no matter how many burps, pressure tests, leak tests, and components I replaced!

I finally decided to contact IAG, and my conversations with both Kathy & Jackie were absolutely wonderful! They were both very patient & informative. This build is mainly a street build w/ some track, but after careful debate, we decided to replace the old radiator with IAG's 55mm Competition version and I cannot be any happier with my purchase!

Install Notes:
I believe the 42mm Street Series radiator will be a seamless install, but the 55mm version is a very tight fit when it comes to the fans. Both had to be installed from under the car.

The passenger side fan shroud touches the inlet before the stands at the bottom can be inserted. I had to push upwards enough for the shroud to bend slightly, insert the stand, and ease off. (It can be installed much easier if you cut or grind a few millimeters off the plastic stands).

The driver’s side will be a very easy fit if you do not have a front mount intercooler. The Driver's side intercooler pipe (in my case Cobb) will be in the way of the ear (on the fan shroud) that holds the factory coolant overflow tank. Neither the fan nor intercooler pipe would go in smoothly no matter what order or rotation I installed them in. It scratched up my intercooler pipe, but I ultimately ended up installing the fan first, then giving the pipe the ole hammer fist to force it down into place. (Now that I think about it, removing the secondary air pump may have provided enough clearance to install the pipe at an angle).

Now that the install was completed, ensure all your hoses are clamped down, expansion tank/radiator caps are in the correct places, and burp the system.

Awesome Results:
The car has been driven aggressively up/down hill, in stop/go traffic, and highway speeds with the radiator for a week. All I can say is WOW!
Outside temps have been in between 59* and 81*, I've struggled to get it to get past 194*.

Highway Driving- 170* to 181*
City Driving- 178* to 189*
Uphill Driving- 182* to 194*

Once again, thank you Kathy & Jackie! I am extremely happy with this radiator and would highly recommend it to anyone who tracks their vehicle.
The rest of us, stick to the 42mm Street version. You'll be more than satisfied with the extra cash in your pocket =)