Looking to replace OEM valvetrain on 05 STI.
What is weight of intake/exhaust OEM valves?

Valves Intake Exhaust
Sti 2.5l 48.2 grams No exh. valve
WRX 50.8 grams 51.2 grams
Ferrea S.S. 53.8 grams 46.4 grams


I have some others I'll have to add to the list when I get a chance.

Thanks - been off line for a few days.

Been wondering, if the OEM valves are lighter, why not use them and just upgrade the springs and retainers when prepping the heads.

Pls confirm weigth for Ferrea exhaust @ 46.4 grams as significantly lower than
numbers for Crower. Are the Ferrea numbers for +1, or standard? I'll try to get OEM sodium exhaust valve number

Here are numbers for Crower valves:

Exh
50.8g Inconel Std
53.1g Inconel +1mm
55.3g Race Stainless Std

Int
50.5g Race Stainless Std
53.0g Race Stainless +1mm

Valves Intake Exhaust
Sti 2.5l 48.2 grams No exh. valve
WRX 50.8 grams 51.2 grams
Ferrea S.S. 53.8 grams 46.4 grams


I have some others I'll have to add to the list when I get a chance.

Yes this is for the Ferrea 1mm over.
I have Crower valves I’ll double check, I think some ware near stock, like you posted.
I also have some Jdm sti valves I’ll post.