MAKE
AND
MODEL
INDEX		 BN-842A

3 bolt single inlet;  2 bolt out
w/sensor;  21 3/4" length
 
BN-842B

 

3 bolt single inlet;  2 bolt out
w/sensor;  27 1/2" length

OEM# Q11
PART
NUMBER
INDEX
  BN-842C

1-3 bolt dual inlet;  2 bolt out 
w/sensor;  27" length
OEM# GA9
BN-842D

3 bolt single inlet;  2 bolt out
w/sensor;  27 1/2" length
OEM# GA9
B & D Interchange
later model for B,  larger body than B

 
  BN-842E

3 bolt single inlet, 2 bolt inlet
w/sensor,   21 3/4" length
OEM# GA9
A & E Interchange
E has larger body than A
BN-842F

3 bolt dual inlet,  2 bolt outlet
w/sensor,  27" length
OEM# GA9
C & F interchange
F has larger body than C