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
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
This article explores and unravels the mysteries surrounding the sometimes controversial issue of venting Type 4 cranckases, for street and track cars.