evo3 16g exhaust housing

[byebyev8]

I have 3 different exhaust housing for my evo3 16g. Which one is the best to use I run 28+ psi on e85. I currently have a ported big 16g exhaust housing on the car with the smaller flapper with a few cracks.

I also have a extremly ported evo3 housing with the 34mm flapper

Also a stock unported evo3 housing without the 34mm flapper.

I've read that porting the evo3 turbine housing doesn't add flow but is the evo3 housing better than the big 16g housing i have on the car now.

 

[pneumo]

The only difference between the EVO3 exhaust housing and the big 16G housing is the material and weight, with the EVO3 being better in those 2 areas.

Since you're using high boost I'd use the ported housing with small flapper, assuming the cracks aren't too bad. You might want to shim the wastegate so it holds boost better.