Borla 140977 S-Type Cat-Back Exhaust System with X-Pipe

The Borla 140977 is a 2.5-inch diameter true dual cat-back exhaust system engineered specifically for the Infiniti Q50. This performance exhaust features a merge X-pipe design integrated with Borla's patented Polyphonic Harmonizer technology to deliver increased horsepower, improved exhaust flow, and a distinctive S-Type sound profile.

Polyphonic Harmonizer Technology:

Borla's innovative Polyphonic Harmonizer uses pipes of varying diameters and lengths to create multiple exhaust notes that harmonize together, producing a clean, rich, full-bodied sound. By eliminating the turbulent center intersection found in standard X-pipes, this design optimizes exhaust velocity while maintaining the sporty S-Type sound level with a deeper tone and zero cabin drone.

Key Features:

• True dual 2.5-inch diameter cat-back system with merge X-pipe
• Patented straight-through and multi-core technology for maximum flow
• 4.5-inch bright chrome tips on T-304 stainless steel (each side)
• Ultra-smooth mandrel bends for unrestricted exhaust flow
• Precision CNC-manufactured for accurate, direct-fit installation
• Constructed from premium T-304 austenitic stainless steel
• S-Type sound profile: sporty and aggressive without interior drone
• Backed by Borla's Million-Mile Warranty

Performance Benefits:

This cat-back system unlocks hidden horsepower by reducing exhaust backpressure and increasing exhaust velocity. The result is improved throttle response, enhanced fuel economy, and the unmistakable Borla Sound of Power. T-304 stainless steel construction provides superior corrosion resistance and durability compared to inferior 400-series stainless steel used by competitors.

Optional configurations with black chrome tips and carbon fiber tips are available under separate part numbers. Designed, engineered, and manufactured in the USA by the world's most experienced exhaust brand.