did anyone ever notice that supercharged fuel dragsters dont hardley have any exhaust pipes? they dont need exhust back presure to prevent re-version because the blower pressure dont give the exhaust any choice butt to "get outta dodge" !!!!!! or international in our case? another good case is the rolls powered p-51 mustang. they had 12" exhaust pipes. some early test planes tryed exhust manifolds, but they ran better without them. supercharging again raises its ugly head, haha