Ported 1986-1987 Turbo 3.8 Liter Intake
Casting number

Ported Driver Side

Ported Passenger Side

86-87 Intake Manifold
86-87 Intake Manifold
Features of Note:
  • All aluminum
  • This manifold has the EGR blocked off with a plate
  • EGR tower is milled off in the front of the manifold (left side of the picture)
  • Notice the extensive smoothing and blending around the interior surfaces
Features of Note:
  • Here again you can see no EGR tower in the front of the manifold (right side of picture)
  • Brass fitting at right of picture is where heater hose rail would go
  • Again, see the smoothing and blending
  • Ports have been matched to the heads (can't see this in the picture)

Ported Plenum

Ported Plenum

Features of Note:
  • All aluminum
  • EGR tower is milled off in the front of ported plenum (top)
  • Notice the extensive smoothing and blending around the interior surfaces
  • Even the little "bumps" for the throttle mounting bracket have been removed (top of the plenum in the picture)
Features of Note:
  • From this angle you can see the EGR provision is removed
  • You can see how all sharp angles have been radiused and smoothed to easy transitions

Stock Throttle Body

Ported Throttle Body

Features of Note:
  • All aluminum
  • You can see the uneven sizing in how the throttle body relates to the upper plenum
  • Notice ridges and rough transitions all down the "barrel"
Features of Note:
  • You can see the match up is much better here.
  • Throttle body is smooth with no lips or transitions
  • Gasket was trimmed to ensure it didn't protrude into the air flow

Submitted by:

Shawn Bestvater
gnandgs@mcbain.tzo.com