When upgrading to a 13B, do you guys switch out the radiator if so, which ones fit other then ordering one w/ the required dimentions?

 

Stock is fine.

 

The 12A radiators are larger than they need to be because of the water/oil cooler. A 13B with an air/oil cooler gets rid of a lot of heat thourgh the oil; so the cooling system does not need to work so hard.

 

Sweet thanks, one less thing I will have to buy.

 

im using the stock 12a radiator. no problems here.

to tell you the truth. i have an 2 e-fans one sucking and one blowing that spin way faster then i need. and a oil cooler form a S4. i drove my car. for about 2 hours (mostly hard driving because i was happy it was running good) i stoped to pick up one of my friends got out poped the hood to show him the beast i put my hand on the radiator cap and it was warm almost cold. i was like wtf!? i took the cap off with no problem the car stay super cool. and this was on a 90 degree day.

it kinda bothered me. i thought the coolent was not getting to the motor an just chilling in the radiator. but i checked it. its doing its job

so the stock 12a rad. will do the job