Description: These Sinister Diesel Up - Pipes are a perfect fit for 1999.5 - 2003 Ford trucks with 7.3L Powerstroke engines. The factory 7.3L Powerstroke Up - Pipes often fail at the bellows - style flex joints, leading to power - robbing pre - turbo exhaust leaks. But removing them for straight tubing can cause long - term damage from heat expansion and vibration. Our Up - Pipes use a stronger 'double slip' joint. This design allows the upper and lower sections to move due to heat expansion while keeping a complete seal. It also offers flexibility for aftermarket turbo kits. Made from stainless steel tubing, solid stainless steel CNC flanges, and including the factory cast merge piece. All seams are TIG welded for precise fit and back - purged for high - quality, strong welds. Available in Raw Stainless, Ceramic Coated, or Wrapped finishes for extra protection, durability, and a stylish look. Part Number: SD - UPPIPE - 7.3. Features: Stainless Steel Construction, Mandrel Bent Tubing, CNC Machined Flanges, OEM Cast Merge Piece, Fully TIG welded and back - purged, Raw Stainless Steel finish.

Using these up - pipes is straightforward. First, make sure your vehicle is turned off and cooled down. Remove the old up - pipes carefully. Then, install the new Sinister Diesel up - pipes in their place, following the correct alignment. For a better fit, use a torque wrench to tighten the bolts to the recommended level. When it comes to maintenance, regularly check the up - pipes for any signs of damage or leaks. If you notice any issues, address them right away. Keep the up - pipes clean. For the ceramic - coated or wrapped finishes, avoid using harsh chemicals that could damage the coating. With proper use and maintenance, these up - pipes will serve you well for a long time.