Join Date: Mar 2001
Location: USA BITCH- WHO IS ASKING?
no- the only thing that qualifies the head to be "emission's friendly" is the EGR passage on the inside parts of heads between the 2 and 3 and 5 and 6 cylinders- this port runs from the intake to the exhaust vavle on the outside of each head- if you have this passageway then your head is "smog legal"
there is also a thermactor passage on the back on each head that the stock thermactor air tube bolts to on an OEM head but they are not required to pass emissions since air only goes to that air tube for about 30 seconds after intial cold-start start-up then the air from air pump is routed to the H-pipe via a metal tube on the pass side.
my emission legal Gt40p heads do not have the thermactor port but will (or I atleast hope they will) pass emissions.
1990 5.0 LX hatchback-
Vortech SC trim, AFM Powerpipe, GT40p heads, 1.6 FMS RR, Pro-M 80mm, 24# injectors w/8:1 FMU, Cobra intake, FMS ceramic headers, high flow H-pipe, Flowmasters, subframes, FMS 65mm tb, 93 Cobra rear disk conversion, 01 Bullitt full suspension kit, FMS alum. drivershaft, cobra upper control arms, 3.55 FMS gears, Moser axles, MSD 6BTM, Mark VIII fan w/DC controller, Autometer: oil, fuel & boost guages, AEM WB 02 sensor, ROH ZS 17" w/Nitto 555
Lots of evil black rifles and ammo!