Originally Posted by
4 l-bodies
Hum, now I'm confused. All the FM style "logoed" covers I've seen have had 2.75" inlets on them. IMO the FM covers are somewhere between to4B and to4E. BTW Turbonetics back in the day had a "Hi-Fi" cover that came with 2.75" inlet. The old FM covers were like that but had the actuator mounting boss added. The sad part is the FM covers had a couple issues. A STOCK actuator wouldn't bolt on (but Turbonetics one did), and the outlet although angled, wasn't angled enough to use a stock lower intercooler hose AND still clear the cylinder head. Apparently, the design never took into account that because the compressor housing is physically larger than a t3 cover, the angle would have had to be increased, and it wasn't. See 2nd & 3rd^ photo Chris borrowed from me :-)
Pics attached are true to4E and to4B FM cover
Todd