Brian and his team are well aware of the problems associated with large diameter thin-wall steel tubing in that, round dies used in conventional press bending cannot bend it without collapsing or crimping the tube to some extent.

While this might be acceptable for regular automotive exhaust systems, for high performance any reduction of pipe size creates a restriction which, in turn, reduces power and economy.

To overcome this Brian invested in C.N.C. mandrel bending machines to bend pipe without restriction which means increased airflow into, and out of, the engine. The CNC mandrel bending machines use a pair of half-round steel dies to hydraulically bend the outside of the tubing. The difference is that the mandrel bender inserts an articulated steel "stiffener" (the mandrel) inside the tube to keep it from collapsing. It's much like a series of three or four metal donuts (held together by a ball-and-socket and spring arrangement) just a hair smaller in diameter than the inner diameter (i.d.) of the tube.

Aluminised System (in black heatproof paint, as per customer order) 70 series V8 Ute.

4.2L GU Ute 3" system kit

Most exhaust systems on 4WD and commercial vehicles will require several bends. The larger the tubing the more severe the crimping will be with regular tube benders. A major benefit of mandrel bending therefore is the increase in the size of diameter of the pipe.

Tight Radius Bends in 1 3/4", 1 7/8" and 2" all 63.5 CLR.

Beaudesert Exhaust Custom Work

Custom set of stainless steel polished extractors

Custom Boat extractors 
Surprise Yourself and Your Engine!