Everyone has their different opinion when building motors. For a simple B20 build, why would you need to take the head to machine shop? If you know the history of the head and its in good working order then slap it on the bottom end. I have never had a problem when i do this. Our b16a has been through a few different heads, no need for machine shop.

delsol9000rpm, do you research mate before posting. These RS machine has been done here in Australia. There are a few motors floating around with these pistons in the b20 bottom end. They can easily make over 150kw with someone who knows how to build the head properly. Also with the right bolt-ons, like TRI-Y headers, tune and intake manifold combo these power goals can be achieve.

You dont need to spend big money on branded items especially when the market for honda products are so dear now due to the economical crisis. But if you are still think brand names are the best, use them and let us know the result.

All im sharing is my experiences with the RS machine pistons, as they are affortable and are good quality product for what they are.

In regards to the american dyno's, yes there dyno numbers are whack but if you know the correction percentage you can use something call the calculator and work out the australian figure. ET's talk, and the yanks do back up their 'wack' dyno's numbers with the 1/4 mile result. (Sign on @ honda-tech.com and check out the all motor section)