82 mm Throttle Body Upgrade for 63 Series (M156 Engines)Throttle Body Upgrade for M156 63 AMG Engines. Our proprietary 82mm Performance Throttle body package offers a 22% increase of incoming air volume. This translates into a noticeable gain in both overall performance and throttle response with a performance increase of 11hp & 8 lb ft. RENNtech throttle body assemblies were designed and engineered in house and a re a bolt on component requiring no modifications to the intake manifold. Our throttle
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82 mm Throttle Body Upgrade for 63 Series (M156 Engines)