Post by
corn322 »
https://forums.nicoclub.com/corn322-u6695.html
Mon Jun 09, 2003 2:59 pm
I'm not aries, but a crush bent pipe is, like it says, crushed at the bends. not too much, but it is a smaller diameter at the bends, and leads to turbulence and unhealthy amounts of backpressure.
mandrel bent, on the other hand, keeps the same diameter throughout the bend. costs more, but keeps the exhaust gasses flowing smoother.