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This seals off oxygen from entering the weld pool - which can cause poor quality and loss of corrosion resistance
Perfect for turning heads on chilly days
(1) STM Billet Fitting
• DOT Certified
using high-quality 1018 Steel from North America
STM WRX/STi 2015-2020 Axle-Back to Cat-Back Upgrade STM Tuned Inc. This seals off oxygen fromIf you already purchased the STM Axle Back Exhaust, you can purchase the rest of the cat back system separately for a full upgrade! This *should* also be compatible with many other aftermarket axle backs that have a 2. 5" flange and bolts to the stock locations, but please confirm before purchase. The STM Stainless Steel Cat Back Dual Exit Exhaust for the 2015+ WRX and STi will bolt up to your stock or aftermarket downpipe and gives you everything you
