I've heard of (at least a couple) people adding transmission coolers to cars that they track regularly. Are these all custom fabbed? I assume you'd need lines, a pump, etc. Are there any kits out there? If not I wonder what parts they use to make their custom kit. This is for a 5 speed 2007 wrx wagon. Thanks.I've heard of (at least a couple) people adding transmission coolers to cars that they track regularly. Are these all custom fabbed? I assume you'd need lines, a pump, etc. Are there any kits out there? If not I wonder what parts they use to make their custom kit. This is for a 5 speed 2007 wrx wagon. Thanks.