That sounds decent is that milltek system ^^. ? I did like the looks off the scorpion system as a mate recommended it but they don't do manifolds as far as I can see unless they use them off another car if it'. A perfect fit or summit??
Manifolds are never going to happen. To complex and custom parts needed plus i got to pay for a jig plus time to get the jig made if i want to keep the design to get more made later. If you want manifolds cheapest is Dubpower at £395