Much of that article appears to be boilerplate from previous STI releases. In the US, the EJ257 does NOT have forged pistons (including '07 models), primarily due to emissions. EJ257 has hypercast pistons, which are ~16% silicon, making them extremely hard & resistant to abrasion and very resistant to deformation under heat/load. In other words, Subie can achieve tighter engine tollerances to make the car run cleaner and more efficient, since hypercast pistons do not expand as much as forged pistons do as they heat up. Unfortunately, though, hypercast pistons *can be* more brittle and less likely to survive knock events. Key words here are "can be." Overall piston design is also important in terms of ability to survive det.Borti said:Is this for the US?
Can anyone verify if the 07 has forged pistons?
Solid rubber is what was in the '04 and '05 cars. In '06 they tried liquid-filled plastic mounts, but they were not up to the task so they went back to rubber sometime during the '06 model run. So don't worry about the mounts.STiJunki said:However, I'm not too sure about the solid rubber engine mounts. Wonder how they'll hold up.
Cool. Thanks for the info :tup: You've eased my mindwdb said:Solid rubber is what was in the '04 and '05 cars. In '06 they tried liquid-filled plastic mounts, but they were not up to the task so they went back to rubber sometime during the '06 model run. So don't worry about the mounts.
Just to confirm what has already been posted about the 06 "bad" motor mounts....My 06 was up on a lift at the dealership this week for a new DP installation, and the tech confirmed for me that I had the "good" hard rubber & metal motor mounts ('05 model vintage). My car was built in March of this year....JustinH said:sooooo, from what i am reading; if one were to buy one of the last prouced models 06's right now, they have the good, solid rubber mounts that were on the 04/05's? 07 is tempting since it has the longer 2nd and 3rd which makes daily driver and drag racing better, and the passtrhough with in the trunk, but you can only get OBP with silver rims! =-(