I see a company TopLine heads were made in New Zealand then in Queensland Australia and during the GFC the company was bought out by RHS who i now find is owned by Comp Cams.
I still see engine builders offering TopLine heads on 550hp engines like the 420ci speedway motor Klein Racing Offers.
Are these heads still being made and i hear Ron Shaver in California sells these heads "apparently"

 

The general consensus seems to be that AFR is better quality and higher performing in the same size range.

GD

 

 

i wouldnt bother with an unknown brand or the cheaper stuff,, brodix,dart,rhs etc,,, AFR are a mile ahead as for as buying something and bolting it on and i have seen the 195,s for $1400 on ebay new

just curious why these topline heads were made here and i knew nothing about them......

 

All of those companies you named produce fantastic heads. Without replacing heads on the same motor, it's hard to say what is best. Flow numbers vary from bench to bench and don't tell the entire story. I have owned Dart, Trick Flow and AFR heads but on different motors. I'd say the biggest disappointment has been the Dart Iron Eagle heads from the bunch.