Would be great to have a meetup for all these guys.
quick summary of the kits out there.
ESS has sold the most kits internationally , due to its reliability. if installed correctly, with 100% proceedures by following the English manual.
AA: Using Rotrex blower, the lower PSI kits output less HP than ESS, the higher ones , like 8psi uses meth which i didnt want to due to reliability.
VF has fault codes, torque management errors, alot of pissed owners. couple of the US m3 guys want to sue them.
Gpower SKII CS, on 6psi boost, not bad, but i dont wanna go with ASA this time after going thru 2 of them. 610 hp (448 kW)/590 Nm ,
Gintani: They are in testing now for a twin turbo kit, looks outrageous, shd be bloody quick. Their chargers are from Vortech also, V3 Si.
2007,2008 and early 2009 cars require update of rod bearings, main bearings and oil pump to new BMW specification before installation of kit.