got my inj new from mike r and the first thing harvey said when he asked what inj i was using was to get them to him to flow test them, i think some have had probs. I used a pj manifold but had to modify for my wastegate cos of a different flange and did not like the mounting position. I could have modified a standard one and saved a fortune , but where the take off is it bares off from the manifold rather than at 90 deg so a bit better for flow.