This.... When boosted you do get the advantages of better manifolds, but from what I've seen a mid-range manifold won't sacrifice you that much power. I'd say max it's 10bhp/lb.ft, less than that vs the TD (which I still class as a upper-mid system). So that means you can get better value for money, or probably free vs the sale of the TD one. Options are: Cobra (doesn't look UEL but is classed as), HKS and Tomei to name a few, or some USA offerings.