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View detailsBad Ass Custom Truck Parts specializes in fiberglass fenders, bumpers, door panels, and accessories for Class 8 semi trucks. We carry parts for Peterbilt 379, Peterbilt 389, Kenworth W900, Kenworth T800, and Mack trucks. Whether you need a direct OEM replacement or a custom look, we have you covered — and we ship fast.
Shop fiberglass semi truck fenders, custom bumpers, interior door panels, fifth wheel covers, and semi accessories all in one place. Trusted by owner-operators and fleets across the country.
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Premium Quality
Made in the USA Fiberglass Semi Truck Fenders
Proudly made in the U.S.A. in Seymour, Indiana, Bad Ass Custom Truck Parts hand-builds premium fiberglass semi truck fenders designed for real-world abuse. Our double hump and custom fiberglass fenders are engineered to handle serious miles, heavy loads, and brutal road conditions.
Every semi truck fender we build is made in the USA and backed by a lifetime warranty—so you get parts that don't just look tough, they perform. When you run Bad Ass fiberglass fenders, your truck is ready for whatever the road throws at it.














































