Frequently Asked Questions About Freightliner FLT Cabover Elbows, Piping & Comp.

What years and models of Freightliner FLT cabovers do these exhaust components fit?

Our exhaust elbows and piping are designed to fit Freightliner FLT cabover models from 1978 to 1991, including the FLT86, FLT75, and FLT64 series. Most components are universal within this range, but some specific bends and angles vary between pre-1985 and post-1985 models due to frame modifications. Always check the product description for exact fitment details or contact our team with your VIN for verification.

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

We offer both aluminized steel and 304/409 stainless steel options. Aluminized steel components typically last 3-5 years and cost 40-60% less, making them ideal for trucks in dry climates or lighter duty cycles. Stainless steel options last 8-12 years and resist corrosion better, especially important for trucks operating in salt belt states or coastal areas. Most customers choose aluminized for budget builds and stainless for long-term reliability.

Do I need special tools or professional installation for these exhaust components?

Basic installation requires standard hand tools, exhaust clamps, and hangers. However, many FLT cabover exhaust systems require cutting and custom fitting due to variations in frame rails and suspension setups. A reciprocating saw, measuring tape, and welding equipment may be needed for custom applications. Professional installation typically takes 2-4 hours and costs $200-400, which many customers find worthwhile to ensure proper fitment and avoid exhaust leaks.

What diameter exhaust piping should I use for my FLT, and does it affect performance?

Most FLT cabovers use 5-inch diameter exhaust systems as standard. Stock naturally aspirated engines work well with 5-inch, while modified or higher horsepower engines may benefit from 6-inch piping to reduce backpressure. Using undersized piping can increase exhaust gas temperatures and reduce fuel economy. We recommend staying with factory specifications unless you have engine modifications exceeding 400 HP.

How do I prevent exhaust components from rattling against the cab or frame?

Proper hanger placement is critical on FLT cabovers due to limited clearance. Use heavy-duty rubber isolator hangers every 3-4 feet and ensure at least 2 inches of clearance from the cab, frame, and air lines. Many customers add heat wrap or exhaust wrap at potential contact points. Check that all clamps are torqued to 60-80 ft-lbs and retighten after the first 500 miles as components settle. Consider using band clamps instead of U-bolts for a more secure, rattle-free connection.