mgf RIFLED exhast

does anyone know or have come accross a rifled exhaust system for mgfs?

like inside a rifle the barrel has a thread type ream in the bore that helps spin the bullet as it exits the gun, ive heard of car manufactures like bentley who have done this to the manifold to help create an air vortex and allow the exhaust gasses to exit out of the exhaust faster, hence more horsies to play with.



im curious if there is a company that can do this, and to what cost?

from the last news http://forums.mg-rover.org/showthread.php?t=723777&goto=newpost

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