Originally Posted by future370zzz

Reliability is gonna to depend on how far you want to push each kit and how hard you are on the pedal. With a good custom tune each kit should be reliable, but as you increase boost and power other parts of your car will need to be re-inforced to take the power ( I.e. clutch, Csc, valvebody, trans, oil temps).

No one really knows how much harm these kits are doing since people that still have the kits are either still running them or have removed them and sold the car. I have not seen any people do post-force induction compression/leakdown tests of their engines. I have not see any recent threads about blown motors. Proper installation and TUNE are key to "reliability". Define it how you want.