I originally published this article in 2012. Though I’ve made advancements in certain areas with all three of these heads, the basic info here is
Why we no longer work with used Type 4 Cylinderheads.
A brief debunking of a common misconception about water cooled cylinder head cracks.
This problem of intake valve seats dropping has struck quite a few owners over the past few years. We first became aware of it with
Blueprint Specials. For the VW Bus owner who has everything… but a great set of heads!
Remanufacture of 356/912 Porsche cylinderheads is covered in this article.
These heads produced by AAPistons are knockoffs of the 039 101 371A heads that came on pre-smog 2.0 914/4’s. They are often referred to as