Please check notes in each part listing to ensure the Leaf Helper Spring is correct for your 1978 PLYMOUTH PB100 with a 3.7L 225 engine. RANCHO & DAYTON are competing brands, and each brand's Leaf Helper Spring may be interchangeable. Special restrictions like "California only" or "with sport package" may indicate a Leaf Helper Spring fits only certain 1978 PLYMOUTH PB100 models.

Clicking a "More Info" link will display a picture and/or other details about that Leaf Helper Spring in a separate window (you may need to turn off your pop-up-blocking software for this to work).

After choosing a Leaf Helper Spring, 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 Suspension parts, other PLYMOUTH PB100 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 1978 PLYMOUTH will not be lost if you switch.