The Borla Touring cat-back exhaust system brings a refined tone to the 2006-2012 BMW 325i, 325xi, and 328i (E90) with a dual left rear exit and polished T-304 stainless steel tips. Borla cat-back systems use patented straight-through, multi-core technology to free hidden horsepower, increasing exhaust velocity for added power, driving excitement, efficiency, and the distinctive Borla Sound of Power. Each system is built from premium T-304 austenitic stainless steel, with ultra-smooth mandrel bends for maximum flow and CNC-manufactured parts for an accurate fit, and is backed by the Borla Million-Mile Warranty. This system mounts behind the factory catalytic converters and is 50-state emissions legal. Borla exhaust is handmade in the USA.
Specifications:
- System type: Cat-back exhaust system
- Sound level: Touring (mellow, refined)
- Material: T-304 austenitic stainless steel
- Construction: fully welded, mandrel-bent, straight-through multi-core mufflers
- Tips: polished T-304 stainless steel
- Exit style: dual left rear exit
- Emissions: 50-state emissions legal
- Warranty: Million-Mile Warranty
- Made in the USA
- Part number: 140505
Vehicle Applications:
- 2006 BMW 325i
- 2006 BMW 325xi
- 2007 BMW 328i
- 2008 BMW 328i
- 2009 BMW 328i
- 2010 BMW 328i
- 2011 BMW 328i
- 2012 BMW 328i
FAQ
What vehicles does the Borla 140505 cat-back fit?
It fits the 2006 BMW 325i and 325xi and the 2007-2012 BMW 328i (E90).
Is the Borla 140505 cat-back legal in all 50 states?
Yes. It mounts behind the factory catalytic converters and is 50-state emissions legal.
What is the exit configuration?
It is a dual left rear exit with polished T-304 stainless steel tips.
What is the system made from?
It is built from premium T-304 austenitic stainless steel with mandrel-bent, straight-through construction for maximum flow and durability.
Is it made in the USA?
Yes. Borla exhaust systems are handmade in the USA and backed by a Million-Mile Warranty.

