Turbo Magazine Homepage Turbo & High-Tech Performance

0305tur Part1boost03 Z

In order to resurface the decks, the two halves need to be disassembled and resurfaced individually. Once the engine is squared, Mike machined a step deck on the surface. What this does is provide much tighter clamping around the combustion chamber area.
Subaru WRX Tuning Attack: EJ20 Engine Build

In order to resurface the decks, the two halves need to be disassembled and resurfaced individually. Once the engine is squared, Mike machined a step deck on the surface. What this does is provide much tighter clamping around the combustion chamber area.  View Related Article