Cavalli Turbo designed this WRX and STI drop-in turbo in house from the ground up.They have applied their Patented Triplex Ceramic Ball Bearing Billet turbo technology to this Direct Replacement Drop-In Turbo. They chose a 51mm inducer/47mm exducer for their Stage 1 application for enthusiasts who are looking for up to a 40% increase in power while maintaining stock spool characteristics. It is recommended to use of 850cc or 1000cc injectors for 91/93 octane and 1000cc for E85 applications. They utilize a Turbosmart wastegate actuator to help stabilize boost on this high boost application. They do not recommend large diameter aftermarket exhaust manifolds/headers as a diameter over 1.25" drastically reduces exhaust energy and will move the power band to a normally less than desirable range for a street driven car.
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