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Its clever design helps keep your interior temperature cool in the summer or flip it around to help prevent frost build-up during the winter months
the slots also will provide efficient cooling that will perform under daily driving duties
Knurled inner bore retains grease to prevent squeak
Saves weight in comparison to the OEM exhaust
IAG Performance Unequal Length Header & Uppipe - Subaru Models (Inc. WRX 2002-2014 / STI 2004+) PDM_hid-light-components Its clever design helps keepIAG Unequal Length Header and Up Pipe 2002 2014 Subaru WRX 2004 2021 STI More Power and the Iconic Subaru Rumble The IAG Unequal Length Header and Up Pipe package replaces both the OEM exhaust manifold and up pipe with stainless steel components engineered for improved power output, throttle response, and the characteristic Subaru boxer rumble that unequal length headers produce. Smooth mandrel bends, increased piping diameter, and durable stainless