lol....I know its just fun arguing about it cause i wish you would leave those poor old manifolds alone
yes I don't believe I have ever seen any definitive results either way despite Staos claims.And the modifed hosuing design he used wasnt very good from memory....either way I honestly don't believe one is any better than the other from a performance point if view..
But as Scotty states, creating a modified new part is always going to be more foolproof than modifying an old one...the stock manifold has been through enough already to last this long, its already prone to twisting and warping, why weaken it anymore by drilling holes in it when the performance gains are non existent..
I think people just get all precious when it comes to modifying (read drilling a hole in) that new turbo they just paid 1k plus for...but turbine housings are easily replaced with new items...RB manifolds, well they don't make those anymore do they!