The BL-VF52HF features a larger than factory billet compressor wheel (50mm x 68mm, 18G sizing) and a high flow factory size turbine wheel (53mm x 48mm). With this upgraded rotor-group you can expect to make up to 350whp on pump gas and 380+whp with ethanol blended fuels. These units are 100% bolt-on with no modifications necessary. Hardware and gaskets are included for a seamless installation process.