Outlet diameter of the OEM Exhaust valve??

Thor

Member
Hello!

anybody here who can tell me how much is the diameter from the exhaust valve (exhaust manifold side) outlet? How much is OEM and how much is ported possible?

Thanks
Sascha
 
Should be able to tell if its been ported just by look and feel, as it should be nice and smooth, compared to the standard head as it has a like texture feel to it, if you know what i mean
 

stumo

Active Member



The ports are massive, the pic shows how small they can be without loosing 1CFM.

The exhaust needs work around the valve pocket and valve seat, not the ports.
 
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