A larger throttle body is key to producing additional power throughout the power band on modified engines with increased airflow demands. The new Grams Performance and Design MKIV throttle body features a large 70mm bore, which results in significant horsepower gains throughout the power band on heavily modified, naturally aspirated applications and even more on forced induction ones.. Drive-By-Wire Electronic Throttle Body; Bore Size 72mm ID; Incl. Spacers/Plug And Play Harness Adapter/Hardware;. Grams Performance DBW Electronic 72mm Throttle Body 2012+ Scion FR-S / Subaru BRZ. 50 Percent Increase In Airflow Over Stock 64mm Body. Factory Programmable Non-Contact Hall Effect TPS. CNC Machined Billet 6061-T6 Aluminum Housing. Drive-By-Wire Electronic Throttle Body. Precision Honed Oversized 72mm Bore. Wiring Harness Adapter Included. Optimized TPS Response Curve. High Precision Servo Motor. Aluminum Throttle Plate. TBdyAssy

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