Hi, Guest
FR heads are extremely good for boost.
they come with bigger valves machined and installed.
also, you cannot shim a head unless you have the cams in hand.
new springs and retainers are available as an option or possibly standard now, i haven't checked recently. :)
FR heads can still be improved upon with further port work.
i like FS stuff, they do amazing work and the cossie improvements make a solid difference.
but for a PW kit, or any form of boost, i'd still suggest the FR heads.
I think McNews and CFM both offer extra port work on the FR heads they sell and i beleieve CFM is also working on a reworked Stock Zetec head program aswell.
I deal with both Ray and William and would recommend either.
they come with bigger valves machined and installed.
also, you cannot shim a head unless you have the cams in hand.
new springs and retainers are available as an option or possibly standard now, i haven't checked recently. :)
FR heads can still be improved upon with further port work.
i like FS stuff, they do amazing work and the cossie improvements make a solid difference.
but for a PW kit, or any form of boost, i'd still suggest the FR heads.
I think McNews and CFM both offer extra port work on the FR heads they sell and i beleieve CFM is also working on a reworked Stock Zetec head program aswell.
I deal with both Ray and William and would recommend either.