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I have both but only the IC is installed so far. I had to give 150 each. I got the IC off an FTE member and I got the trans cooler locally. It's a brand new 31 row I intend to install as soon as I get some time.
As far as the IC,I couldn't tell,I don't have one,as far as the 6.0 trans. cooler,I bought a 26 row 6.0 trans.cooler for like $50.and it lowered my trans.temps by about 50*.After drag racing hard for like an hour and a half,my trans.temps never got above 150.I haven't done any towing since the install,but I'm sure it's only better.