the power pros company appears to have made right bend pipes for CT, F7, Trinity and Greydon Proline
some earlier models were hand rolled cones, at least the CT, Greydon and Trinity
then onto stamped pieces in the latter years when Factory7 started selling them, and most recently CT and Trinity still selling a version of them.
LRD has/had 2 versions of right bend, as does Dyno-port,
both are easily ID'd from the power pro's brands