Exhaust pipe stretcher tool set Stretches Pipe up to 4-1/4" Including Stainless Steel. Use with an impact wrench to quickly stretch pipes. Collet sets expand pipes from 1-5/8" to 4-1/4". The tool can be used on the vehicle. The pipe stretcher kit is a convenient, inexpensive alternative to hydraulic pipe expanders. Comes in a molded storage case. Applications: Expands all types of exhaust pipe, including stainless steel, from 1-5/8" to 4-1/4" in size.    Instructions: Turn 1-1/8" bolt with a 1/2" or 3/4" impact wrench. If necessary, choose appropriate aluminum adapter to use with the standard expander tool. The #3 adapter must be used with the #5 adapter. Be sure to keep threads and cone well lubricated.