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This is a Rectangular Ring Seal for Cummins 4BT3.9, 6BT5.9, ISB3.9, ISB4.5 and QSB3.9 engines. This high quality aftermarket replacement part is guaranteed to meet OEM specifications and is shipped with a 12-month warranty.
Call us at 888.687.0539 with questions or buy online. As always, your satisfaction is guaranteed!
SEAL,RECTANGULAR RING
Genuine Cummins Part
$5.92
THERMOSTAT FOR 4BT 3.9 / 6BT 5.9
Call for price
WATER INLET CONNECTION - 4BT / 6BT / ISB / QSB
$1,356.40
THERMOSTAT SEAL - B5.9M / B160 / 6B5.9 / B5.9-M220 / QSB4.5 / B3.9-M250 / QSB-110C
$4.79
PUSH ROD COVER GASKET - 4B3.9 / B4.5 / QSB4.5 / B3.9-C130
$11.31
