Frequently Asked Questions About Peterbilt 357/378 Fuel Tank Covers & Bras

Will these fuel tank covers fit my specific year model Peterbilt 357 or 378?

Most fuel tank covers and bras for Peterbilt 357/378 models are designed to fit trucks manufactured from 1987 through 2007. However, fitment can vary based on your specific tank configuration, including tank diameter (typically 23" or 26"), tank length, and mounting strap placement. We recommend measuring your fuel tank diameter and checking whether you have single or dual tank setups before ordering. If you're unsure about compatibility, contact us with your truck's year and VIN for verification.

What's the difference between leather-grain vinyl and polished stainless steel covers?

Leather-grain vinyl covers are lightweight, cost-effective options that provide good protection against road debris and UV damage. They typically feature elastic hems or drawstring closures for easy installation and removal. Stainless steel covers offer superior durability and a high-end appearance but require more permanent mounting with brackets or straps. Vinyl covers need replacement every 2-3 years with regular use, while stainless steel can last the lifetime of your truck with proper maintenance.

How difficult is the installation, and what tools will I need?

Vinyl fuel tank bras typically install in 15-30 minutes without tools - they slip over the tank and secure with elastic bands or hook-and-loop straps. Stainless steel covers require 1-2 hours for installation and basic hand tools including wrenches, screwdrivers, and possibly a drill for mounting brackets. Some drivers report difficulty with bracket alignment on aftermarket tanks. Always test-fit components before final installation and ensure proper clearance from exhaust components.

Will fuel tank covers interfere with fuel cap access or tank straps?

Quality fuel tank covers are designed with cutouts or access flaps for fuel caps, typically featuring reinforced openings that won't tear or fray. Most covers also accommodate standard tank mounting straps without modification. However, aftermarket strap configurations or auxiliary fuel cap locations may require trimming. Check product specifications for fuel cap opening dimensions - standard openings are usually 6-8 inches in diameter.

How do these covers hold up in extreme weather conditions?

Vinyl covers are treated with UV inhibitors but can become brittle in extreme cold below -20?F or fade in constant sun exposure. In northern climates, remove vinyl covers during winter months to prevent cracking. Stainless steel covers perform excellently in all weather conditions but may show water spots or minor surface rust if not regularly cleaned. For best longevity, clean vinyl covers monthly with mild soap and treat with vinyl protectant. Stainless steel should be polished quarterly to maintain appearance.