aFe MACH Force-ST 2 IN 304 Stainless Steel Exhaust Tuning Insert (49-93003) _Water_Pump_And_Alternator_Pulleys_(3) 90-93 JDM Downpipe w/ Flex

90-93 JDM Downpipe w/ Flex section - 3"

lightweight system that delivers exceptional performance and a captivating induction sound

Each tip comes complete with an AWE logo

Borla S-Type Cat-Back Exhaust System for 2013-2018 Ford Focus ST 2

However on closer inspection

aFe MACH Force-ST 2 IN 304 Stainless Steel Exhaust Tuning Insert (49-93003) _Water_Pump_And_Alternator_Pulleys_(3) 90-93 JDM Downpipe w/ FlexThe ST Sound Core is a patent pending technology from aFe, compatible with MACH Force ST and Takeda ST exhaust systems . With this technology, you can easily modify the sound and tone of your exhaust system. By placing the ST Sound Core in between the two stepped V band flanges in the exhaust system, you can control the amount of flow that is bypassing the muffler, and change the overall tone of the exhaust with the unique reflection chamber design.