T51R Mod compressor cover will give your turbocharger the classic jet spool/whistle sound. Compressor wheel inducer/exducer: 63/87.4mm T51R MOD FAQ What’s T51R MOD - The T51R Mod compressor cover will give your turbocharger the classic jet spool/whistle sound. Does this mod help my turbo spool faster - No, it will operate exactly the same as the standard one. Does it make more power or lose power - Power will remain exactly the same. Can I remove the mod, if I don’t want the sound anymore?? - No, the mod is permanent and irreversible. Special Note: Expert Installation Advised: For optimal results and safety, we strongly recommend professional installation. Please make sure to address all your queries before making a purchase. Performance Dependency: The effectiveness of this product greatly depends on your vehicle’s specific modifications and tuning/calibration settings. It’s important to note that results may vary based on these factors. Balancing for CHRA: After any CHRA rebuild, it is highly recommended to have the CHRA undergo VSR balancing. This step is not only crucial for maintaining performance but also a requisite for warranty validation.