Mid-tail swallow drum (with M tail lip)
Mid-tail electric control valve (original position)
Middle tail electric control valve
Mid-tail valve swallow drum
Head middle tail valve exhaust Swallow drum
Four drive mid-tail valve exhaust
Midtail electric control valve swallow drum
Mid-end back pressure drum
Middle tail out valve exhaust
Catalytic tail electric control valve swallow drum
Two-door version of the tail valve exhaust (with high flow catalysis)
First batch of tail back pressure drum