Are they the same? Are all the M4 Magna heads EFI compatible? Thanks!

I currently have an M2 head (been told it was for carby) that has been running on an EFI set up for ages now, now problems till my timing/spring pin broke.

Are they the same? Are all the M4 Magna heads EFI compatible? Thanks!

they are essentially all the same between carby and efi. M1 was a leaded head though. even the 2nd gen heads (M5, M6 onwards) are the same, with different shape/size combustion chambers and the rocker gear.


I currently have an M2 head (been told it was for carby)

M2 was an unleaded TM, thats why it's a from a carby astron.

All the Magna heads will run EFI quite happily in my experience

I just repalced the head on my son's TR from a TP and all I did is changed the rockers and cam from the TR and it works fine.:D

Whats the diff between a stamped M4 head and the M5?