fitted a forge TIP on friday night after much trouble getting the car up, i don't no whether i was expecting to much but i haven't noticed any gains or more noise which i thought you got from fitting them especially as i had that fitted and a full turbo back exhaust system with a 100 cell sports all within 3days. if anything the dump noise is quieter! i suppose having the n75 valve knackered is helping the matter but still all that blood,sweat and tears for nothing really!!