Manufactured by STi in Japan, this muffler pair has been designed and engineered to fit directly onto the 2015 WRX STi. Around 1.9kg lighter, the air flow through the mufflers has been increased by 16%, which improves engine response and performance....
A genuine Subaru composite gasket which is used to join the centre exhaust section to the exhaust back box on 2.5" systems.
A genuine Subaru metal/composite donut gasket which is used to join the downpipe assembly to the exhaust centre section on 2.5" systems.
A genuine Subaru metal gasket, which is used to join the turbocharger to the downpipe assembly on Twin Scroll Models only.