Publicado Por En julio 25, 2026 Wide Expansion Range: With various collets, the exhaust expander accommodates pipes from 1-5/8" to 4-1/4" (4cm - 11cm), covering sizes like 1 5/8"(4cm) - 2"(5cm), 2" (5cm)- 2 1/2"(6cm), and more. Heavy-Duty Construction: Constructed with aerospace-grade 6061 Aluminum for the collets and tempered 40CR Alloy Structural Steel for the pipe expander, ensuring durability and compliance with GB standards.