My Fabspeed manifold is insulated - 200 cell cat - not. Saw a picture of a heatshield for the left side done by Fabspeed. Will start next week with installing the manifold. Jeremy - have you got at drawing / sketch of the heatshields you have produced? If so - send it to me. Have a workshop here and can easily fabricate these. But I don´t want to start from scratch - if you have done it already. Regards Anders