For those having a Gen one or Gen 2 engine trying to get even more efficiency out in their 3S-GTE, you’ll need to have to have a look at a bigger turbo and superior intercooler.You'll be able to steer clear of the machine shop if you don't want the oil-to-h2o oil cooler that is used within the K20A2. An oil cooler of some form, even so, is a good