Chev extractors

[searsy]

I have started making some extractors for the old girl and just wanted some opinions
I am using 1.5 inch primary pipes which is smaller than the exhaust ports on the heads (chev)
Should I ditch these pipes and go for the larger primaries or am I over thinking

[searsy]

Well I just spoke to the local engine builder and he reckons if Im not chasing big horse power it should be fine

[wot179]

That's crazy...not much point having pipes smaller than the ports.

It will lack performance and efficiency.

[searsy]

Have decided to go back to the log headers