Please check notes in each part listing to ensure the Lower Engine Kit is correct for your 1981 PLYMOUTH PB150 with a 3.7L 225 engine. Special restrictions like "California only" or "with sport package" may indicate a Lower Engine Kit fits only certain 1981 PLYMOUTH PB150 models.
Clicking a "More Info" link will display a picture and/or other details about that Lower Engine Kit in a separate window (you may need to turn off your pop-up-blocking software for this to work).
After choosing a Lower Engine Kit, click the "Add Part" button. Shipping costs will be shown on the Shopping Cart page. You may use your browser's Back button or click "Find More Parts" to find more Engine parts, other PLYMOUTH PB150 parts or parts for a different vehicle. Please try our Interactive Catalog (click link above) for faster searching. Both catalogs use the same shopping cart so any auto parts you've already chosen for your 1981 PLYMOUTH will not be lost if you switch.