E-cowlboy Injector Sleeve & Cup Cleaning Brush Kit Stainless Steel 2‑Piece — Fits Powerstroke, Caterpillar, Navistar, Durable ABS

E-cowlboy's two-piece stainless steel injector sleeve and cup cleaning brush kit is a durable shop tool designed to remove carbon, rust and debris from injector seats, bores and cups without scoring or damaging surfaces.

When you pull diesel or gasoline injectors, the sealing surfaces around the injector bore and cup need to be clean and smooth to ensure proper seating and prevent leaks. This kit combines two purpose-built stainless brushes — a spiral tube brush and a flat-bottom brush — plus ergonomic ABS handles to reach and clear deposits in a wide range of engines, including Ford Powerstroke, Caterpillar, Navistar, Cummins, GM, John Deere and Isuzu HPCR systems.

How does this kit clean injector seats without causing damage?

The brushes use wear‑resistant stainless steel filaments designed to abrade carbon and rust while minimizing scratching. The spiral tube brush cleans inner bore surfaces and ports, while the flat-bottom brush polishes the seating area for a consistent contact surface.

• Stainless steel construction resists corrosion and retains stiffness for effective scrubbing.
• Spiral tube geometry reaches internal passages and ports safely.
• Flat-bottom brush profiles to the seat contours to remove rings and glaze.
• ABS handle provides control to avoid excessive force or tilting.

Which engines and applications will this brush kit fit?

This kit is specified for many heavy-duty diesel and gasoline applications from 1994–2018 and beyond. It covers common Powerstroke variants as well as Caterpillar, Navistar/MaxxForce, Cummins and several GM, Chevrolet and John Deere HPCR engines.

• Ford: 4.5L LCF, 6.0L, 6.4L, 6.7L, 7.3L Powerstroke models.
• Caterpillar: 3126, C7, C9 series compatibility.
• Navistar/MaxxForce: T444E, DT466, VT365, VT275, 5/7/DT/9/10/N9/N10 families.
• Dodge Cummins, Chevrolet/GMC 6.6L, John Deere and Isuzu HPCR engines.

What materials and design features make this a long‑lasting tool?

The kit uses premium stainless steel for filament durability and corrosion resistance, paired with comfortable ABS handles to control insertion and extraction. Together these materials offer a long service life even in shop environments with fuel, solvents and metal particulates.

• Wear‑resistant stainless steel brushes resist rust and retain shape.
• ABS handles reduce hand fatigue and improve grip during repeated use.
• Two complementary brush shapes cover both bores and flat seating surfaces.
• Compact kit fits standard toolboxes and service trays for routine maintenance.

How should technicians use and maintain these brushes for best results?

Use the spiral brush for deep bore scrubbing and the flat brush to finish the seat. Work with moderate pressure, rotate the brush while cleaning, and inspect the seat visually and with a light before reinstallation. After use, rinse in solvent and dry to extend brush life.

• Rotate brush while applying light to moderate pressure; avoid excessive force.
• Finish seats with the flat-bottom brush to remove final glaze and deposits.
• Rinse brushes in a degreaser or solvent, then dry to prevent contamination.
• Store in a dry place; replace if filaments deform or corrode.

Who is this for: This two-piece E-cowlboy kit is built for professional diesel mechanics, fleet service technicians, and dedicated DIYers who perform injector servicing, rebuilds or swaps. It's ideal when you need reliable, non-marring cleaning for injector bores and seats across multiple engine platforms and want a compact, long‑lasting set that performs under repeated shop use.