RX-7 Rotor Housing Identification
Below are photographs of the differences between the RX-7 Rotor Housings. The easiest way to determine the front from the rear is the "F" and "R" stamped on top of the housings.
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FD: (1993 - 1999) |
 |
 |
 |
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No
Diffuser
|
Blocked
Water Jacket
|
Knock
Sensor Hole
|
|
|
S5 TII (1989 - 1991) |
|
 |
|
|
No
Diffuser
|
Open
Water Jacket
|
Knock
Sensor Hole
|
|
|
S4 TII (1986 - 1988) |
|
|
 |
|
No
Diffuser
|
Open
Water Jacket
|
No
Knock Sensor Hole
|
|
|
S5 N/A (1989 - 1991) |
 |
|
|
|
Diffuser
|
Blocked
Water Jacket
|
Knock
Sensor Hole
|
|
|
S4 N/A (1986 - 1988) |
|
|
|
|
Diffuser
|
Blocked
Water Jacket
|
No
Knock Sensor Hole
|