best cylinder heads

andyv8van · Post by **andyv8van** » Fri Mar 28, 2008 7:45 pm

Hi all,

got a 3.9 rover with 4.0 cylinder heads.i have fitted a newth350 box to the back now and can look forward to getting better bhp from the motor.

what stage etc heads would be best to go for.will look at a new cam shaft as well.

what would be the best company to use????

Andy

mgbv8 · Post by **mgbv8** » Fri Mar 28, 2008 8:25 pm

Andy
I've got a pair of 4.6 (allegedly) heads that I got from a RR breaker.
They are certainly EFI heads, but they have the same size valves as my old 3.5 heads ??

I've polished the ports myself and I run them on the new engine with a Blower cam from RS + Rhodes lifters and the uprated valve springs etc.

Works fine for me at the mo. But I am looking for some big valve heads.