Top tips inlet porting / flowing

[jojackson4]

picked up a cheap manifold and fancy having a go at opening it up a bit
Never tried or had a go at this so am after some tips

Is a 500 which will have a blended bace when I have done
Thanks
Peter

[jojackson4]

Now about 48 mm

[jojackson4]

The steps are all gone
There's a bit more todo but is 90% there
Just after a spare plenom so I can do the big butterfly

[jojackson4]

Thanks for the input gents
The manifold is going on in a weeks time
And then off to jools for a map I will post back with results