OST-118: 1st gen 4AGE head - ported, and rebuilt

User avatar
oldeskewltoy
Club4AG MASTER
Posts: 2214
Joined: Wed Jan 09, 2013 4:44 pm
Location: Portland, Oregon

OST-118: 1st gen 4AGE head - ported, and rebuilt

Postby oldeskewltoy » Thu Jul 17, 2025 1:08 pm

Image

So up for sale is OST-118, a 1st gen 4AGE head in very nice condition. Price is $1400 + a good core, OR $1650 outright.


Porting includes blending/aligning the bowls to their seats, deshrouding the combustion chambers and re-tapering the exhaust ports.

aligning the bowls and seats...

Image


re-tapering the exhaust...

Image


Very nice 3 angle valve job, along with back cut intake valves

Image


Valve tip heights set...

Image


Assembled using new Toda valve springs, and new viton rubber valve seals.

Image



With a surface ready for a metal gasket

Image


And buckets ready for shims

Image


If interested message me, or emailing me is better - oldeskewltoy@yahoo.com
OST Cyl head porting, - viewtopic.php?f=22&t=300

Building a great engine takes knowing the end... before you begin :ugeek:

Enjoy Life... its the only one you get!

User avatar
oldeskewltoy
Club4AG MASTER
Posts: 2214
Joined: Wed Jan 09, 2013 4:44 pm
Location: Portland, Oregon

Re: OST-118: 1st gen 4AGE head - ported, and rebuilt

Postby oldeskewltoy » Sun Sep 21, 2025 3:38 pm

this head is sold
OST Cyl head porting, - viewtopic.php?f=22&t=300

Building a great engine takes knowing the end... before you begin :ugeek:

Enjoy Life... its the only one you get!