Tti 1 7/8 headers

Looking for headers for my 408 running with 6-8 psi boost. Trying to decide on what size of headers would be best for my use. Will be mostly street driving and no strip within 300km. I believe the tti seem to be best fitting and compatible with ps and milodon pan.

Is it better to go to 1 7/8 or stick with 1 3/4