Frequently Asked Questions About Freightliner FLD SBA Elbows, Piping & Comp.

What years and models of Freightliner FLD are these SBA elbows and piping components compatible with?

These SBA (Set Back Axle) elbows and piping components are specifically designed for Freightliner FLD 112 and FLD 120 models manufactured between 1989 and 2002. The SBA configuration refers to trucks with the front axle set back from the standard position, which requires different exhaust routing. Always verify your truck's specific configuration before ordering, as standard FLD models use different exhaust components.

Are these exhaust elbows made from aluminized steel or stainless steel, and which is better for my application?

We offer both aluminized steel and stainless steel options. Aluminized steel elbows typically last 3-5 years and cost less, making them ideal for trucks in moderate climates or those on a budget. Stainless steel components last 7-10 years or longer and resist corrosion better, especially in areas with road salt or coastal environments. If you operate in harsh conditions or want maximum longevity, stainless steel is worth the extra investment.

What tools and additional parts do I need to install these exhaust components?

For a complete installation, you'll need basic hand tools including wrenches, a sawzall or exhaust pipe cutter, and potentially a torch for removing rusted components. Additional parts often required include exhaust clamps (5-inch is standard for most FLD applications), exhaust gaskets, and high-temperature exhaust sealant. Many customers also replace hangers and mounting brackets during installation since these wear out over time.

What's the difference between a 90-degree elbow and other angle options for my FLD SBA?

The angle you need depends on your specific exhaust configuration and stack placement. 90-degree elbows are most common for vertical stack installations. 45-degree and 60-degree elbows work better for angled or side-exit exhausts. Measure from your turbo outlet to where you want your stack positioned to determine the correct angle. Many SBA configurations use a combination of different angles to achieve proper clearance around the cab and frame rails.

How do I know if I need 5-inch or 6-inch diameter piping for my truck?

Most factory FLD SBA trucks came with 5-inch exhaust systems, which is sufficient for stock engines up to about 500 horsepower. If your engine is modified beyond 500 horsepower or you've upgraded your turbo, 6-inch piping reduces backpressure and improves performance. Check your current system diameter at the turbo outlet - this is typically what you should match unless you're doing a performance upgrade.