Harbor Freight Tools


Exhaust Pipe Expander Kit

This superior quality pipe expansion kit works with an impact wrench - no hydraulic equipment needed

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Product Overview

The MADDOX™ Exhaust Pipe Expander Kit works with all types of exhaust tubing, on or off the vehicle. This 7 piece kit comes with all the fittings necessary for expanding pipe from 1-5/8 in. to 4-1/4 in.. The rugged construction makes the expander safe to use with impact wrenches, making it an ideal replacement for cumbersome hydraulic equipment.

  • Works with all types of exhaust tubing, including stainless steel
  • Expands pipe from 1-5/8 in. to 4-1/4 in.
  • Safe to use with impact wrench for quick and easy pipe expansion
  • Use on or off the vehicle
  • Comes with spare O-rings and anti-sieze compound


1-5/8 in. to 2-1/8 in. base expander assembly, 2-1/6 in. to 2-7/16 in. steel expander, (5) aluminum extenders: 2-3/8 in. to 2-3/4 in., 2-2/3 in. to 3-1/8 in., 3-1/8 in. to 3-1/2 in., 3-1/2 in. to 3-7/8 in., 3-7/8 in. to 4-1/4 in., replacement O-rings, ant
1-5/8 in. to 4-1/4 in.
Shipping Weight
9.60 lb.
Note: Specifications are approximate and subject to change


We guarantee this product to be free from defects in materials and workmanship 90 days from the date of purchase. Limitations apply.

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