[justin smith]

I was wondering if you guys know if i can use my ej20G heads on a 2.5l block? also i looking to source a 2.5l block (possible closed deck). thanks justin

 

[kastle]

Question is, why would you want to use the EJ20G heads on a EJ25... they surely wouldn't flow as well as the EJ25 heads

 

[HOK]

upgrading the EJ25 heads is probably the best for ease of modding and higher hp... i wanted the STI heads those sodium filled valves are so tempting... but have decided that changing the heads requires way too much work (changing ECU and wiring harness etc) just upgrade the heads...

 

[justin smith]

I will use the 2.0l heads because one i got them and not the 2.5s and second because then engine i got had bent valves and they were replaced with heavy duty ones. heads are being port and polished as well.

 

[ScottiE]

Cobb Tuning sells a closed deck EJ25 block, pricy but will fit your application if you want to go 2.5.

 

[scotty305]

Cobb Tuning made a hybrid engine: USDM EJ20 turbo heads + a built EJ25 bottom end. It was on the i-club about a year ago, maybe a little more. Good luck finding it, but it was a cool thread.

-s-