FL-171905

Exhaust Reducer/Expander O.D.Inch 5‘’4'' Length 6''
4.5 Ratings
Part # FL-171905
UPC/GTIN# 601961388734
Availability Out of Stock
Feature Specification
Type Universal Exhaust Pipe Reducer/Adapter (OD-OD)
Large End (Inlet) 5.0" OD (127.0 mm)
Small End (Outlet) 4.0" OD (101.6 mm)
Overall Length 6.0 inches (152.4 mm)
Wall Thickness 16 Gauge (0.060 inches / 1.52 mm)
Material Aluminized Steel
Weight 3.8 lbs (1.72 kg)
Configuration Concentric Reducer (OD-OD)
  • Construction: Outside diameter to outside diameter (OD-OD) reducer design with smooth tapered transition from 5-inch OD to 4-inch OD providing optimal exhaust flow with minimal back pressure.​
  • Material: Heavy-gauge aluminized steel construction offering superior corrosion resistance and extended service life in harsh exhaust environments.​
  • Design: Precision-formed tapered walls with smooth internal transition, specifically engineered for OD-to-OD connections where both ends slip into mating components.​​
  • Application: Universal design suitable for connecting 5-inch OD exhaust pipes to 4-inch OD components, ideal for performance exhaust systems and heavy-duty applications.

This is a universal exhaust reducer/expander featuring a 6-inch overall length with 5-inch outside diameter inlet tapering to 4-inch outside diameter outlet. The aluminized steel construction provides excellent corrosion resistance while the OD-OD configuration allows both ends to slip into mating exhaust components. Designed for applications requiring outside diameter connections rather than slip-fit installations.

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