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the BEAM engines have little to no aftermarket support- there's very little non-expensive mods you can do to them and not many manufacturers out there build something for them. If you are going for performance depending on the range you can either get a rebuilt 3SGTE and do lots of mods to it, get a Avalon -V6 and do mild mods on it, or get a BEAMS and leave it mint 200 N/A power is not all that bad.
reliability really depends on you and the way you drive your car. If you are pushing 400+ rwhp your car is gonna need a hell lot more of TLC and maintenance than stock. Wnen you raise the boost- you are straining the engine more.
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