Hi I got a type r the other day but it is far too loud first thing. Its a 2.5 scoobyclinic back box so I guess I can just get a bung for the backbox? This wont affect the breathing in anyway?

Also I think the gearbox rocks a bit from heavy accelaration from 2nd to 3rd. Its only done it twice where it seems like 3rd has moved away from the usual posistion.
Im thinking this might be a gearbox mount.
Are there any upgraded ones people could recommend please