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The hotter the AOS
the fuel rails can support all necessary engine power requirements
The COBB 3" SS Turboback Exhaust is engineered specifically to match the performance needs of the 2010-2013 MAZDASPEED3
The unique snail design allows the system to breathe without disturbing the swirl pattern
two on the bottom and one at each end
Cobb Stainless Steel Turbo-Back Exhaust Subaru WRX (02-07) STi (04-07) g4+ The hotter the AOSThe COBB Tuning SS 3" Turboback exhaust for your Subaru WRX! These components offer excellent power gains, outstanding build quality and an impressive exhaust note. The Turboback includes: COBB 3" SS Downpipe Cast bellmouth and high flow catalytic converter for optimal exhaust flow; COBB 3" SS Cat Back Exhaust Beautiful fabrication and awesome rumble This Downpipe or Stage Power Package requires a custom Tune!! COBB offers OTS Map support for some
