3" MAF pipe vs. 4" MAF pipe

[hboost]

I have a turbo with a 3" inlet, which would be wiser to run on my car 3" or 4", I have a 4" setup from my old TE63, but my TE45a has a 3" inlet and was wondering if I should switch back over to 3".
Thanks,
Joe

 

[ESP Products]

Stay 4". You will have better flow/less drag. We, as well as others, sell a silicon 3 x 4 adapter hose if you need it.

Hope this helps.