4age oversized valves replacement

[speedmaster]

Is there any OEM oversized valves from other engines that fits 16v and 20v? I know some trucks can use 16v springs and valve seals.

[yoshimitsuspeed]

Is there any OEM oversized valves from other engines that fits 16v and 20v? I know some trucks can use 16v springs and valve seals.

Search the MR2OC for using 3SGTE valves. I don't know the details but I know it has been done.

[sirdeuce]

I've heard tell of using 7mgte valves, but some mods were necessary. Take all the info with a grain of salt though. People that tell of the journey to cross over parts are a bit shy when it comes to the results.

[oldeskewltoy]

O/S valves are only half the story.... you'll need O/S seats installed into your head so you can accommodate O/S valves.


Ferrea, Supertech, and SI Valve (likely a few others) all carry an O/S 4AGE valve, a set is usually under $300

[yoshimitsuspeed]

O/S valves are only half the story.... you'll need O/S seats installed into your head so you can accommodate O/S valves.


Ferrea, Supertech, and SI Valve (likely a few others) all carry an O/S 4AGE valve, a set is usually under $300

Supertech recommends running the stock seats.
Don't ask me how this works out to be better but it's what they told me.
I don't go to Supertech much anymore.

[oldeskewltoy]

O/S valves are only half the story.... you'll need O/S seats installed into your head so you can accommodate O/S valves.


Ferrea, Supertech, and SI Valve (likely a few others) all carry an O/S 4AGE valve, a set is usually under $300

Supertech recommends running the stock seats.
Don't ask me how this works out to be better but it's what they told me.
I don't go to Supertech much anymore.

20V? or 16V? or did they specify both.... just wondering because the O/S option on 20V is "only" 1mm(intake only maybe??), while the O/S option can, and typically is 2mm on 16V


16V with O/S seats....

[yoshimitsuspeed]

Pretty sure I was inquiring about the 16v but it was a long time ago so I won't make any promises.

[NH-hillbilly]

supertechs oversize valves are 2mm bigger ex. and 1.5mm bigger intake. Regardless of what they say, (been there done that) you most certainly need a larger seat installed to run these valves in a 16v head.