Quote Originally Posted by Sabrewings View Post
Well, you buy it drilled. The benefit is in colder climates it has a chance to slowly heat up the cold coolant in the radiator during winter. Extremely cold coolant suddenly coming in to the engine block with a non-drilled has been known to crack the block.

Other than that, there's really no point to a drilled t-stat. I doubt the benefits of a 180* t-stat at all. All I noticed was my engine ran cooler and I lost a few MPGs.
Gotcha, Thanks for th info!