Im thinking of replacing my plus 4s GDI manifold with a librands one. What are the benefits and downside( apart from the price) does it make it go that much better,Im not planning to change the exhaust,will it all fit together ,will that create problems ie MOT etc.Is there any body that has it fitted,that is within the 3 counties bordering on Worcestershire that would be willing to let me see their car and discuss it with me,thanks