I was unimpressed with the performance of my 55 plate GTI, went stage 1, bit better but still nothing special, went ITG and TBE Milltek and stage 2, still not on fire, but did pull pretty hard at higher cruising speeds on the motorway, so went to have a HPFP fitted on Tuesday and a stage 2+ map, thought, might as well change the Diverter valve on sunday (diy axle stands from underneath about 1.5 hours slow and careful) When I pulled the valve, diapraghm was ripped in about 3 places
then drove the car to get the HFPF fitted - Oh my god, what a power house with all the mods and a D type valve, but did get fuel cut when pulling about 3.5k revs in a high gear, after the HPFP, well the RR showed 275BHP 315 lbft and the car is insanely fast, can't believe I was modding it all the time with a cream crackered DV!!!! For £50 should be first thing you change!