This is a replacement Compressor Housing (cold side). Fits the Garrett T67, T04R, T04Z turbos with 67mm inducer & 84mm exducer (63 trim) compressor wheel. Has a .70 A/R with 60-1 / T04S design. 4" inlet and 2.5" outlet. Available with bullet hole ported anti-surge & polished upgrades. Simple installation, direct bolt on replacement.