| Sport 500's flow 28 lbs per min. Sport 530's flow 30 lbs per min. The typical street prices are $2000 and $2800 for Sport 530's. This is offset somewhat by the fact that you can sell the stocker cores for between 300 and 450 if you get the Sport 530's because they have no core charge. The Sport 530's are NEW ball bearing turbos - are more reliable and have better transient response. The Sport 500's are not. IMO the Sport 530's are a WAY better deal for what you get. Harry
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