So I currently have a 4D56 head with protruding valves like the 4D55 heads. But, I was wondering if I could bolt on a 4D56 head with flush valves in an attempt to lower the compression ratio so I can add more boost. Will a 4D56 head with flush valves bolt onto my 4D55 block like The 4D56 protruding valve will or is there a physical difference besides the valves?

Anybody, "Bueller, Bueller"

Any help would be much appreciated.

Spence

Anybody, "Bueller, Bueller"

Any help would be much appreciated.

Spence

troll the AU, canadian, UK boards....4d56 wasn't really availible here in the US (most of pirate is US based)

I think I will give the guys at pocuk.com a try.

try pajero of victoria, 4x4wire diesel, outerlimits,