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5-Ply High-Grade Silicone Couplers - Smooth interior to maximize airflow and minimize restriction
MAC Valve has completely custom made the valve for us(only MAC valve on the market to be custom made for automotive tuning use)
actual product may vary in appearance / style
These splitters are designed to seal perfectly with your GrimmSpeed TMIC
GrimmSpeed Pulley Cover Black - Subaru WRX 2015-2020 Subaru-WRX-2017 5-Ply High-Grade Silicone Couplers -The OEM Subaru crank pulley has been a cause for concern ever since its original design. It is extremely heavy, susceptible to catastrophic failure, and quite unsightly. Continuing to use this on our cars just wouldn't do. Eliminating rotational mass while maintaining a safe presence can increase reliability and bring faster Rev's! For Grimmspeed's Lightweight Crank Pulley they pulled out all of the stops. CNC machined from 6061 T6 Aluminum their
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