Catback Exhaust for Scion FR-S (2013-2016) 2.0L

High-Flow Catback Exhaust System for 2013-2016 Scion FR-S

What it Does: The Catback Exhaust System replaces the restrictive factory exhaust plumbing and chambered muffler on the 2013-2016 Scion FR-S to optimize exhaust gas velocity, reduce parasitic backpressure, and improve engine scavenging.

The Stock Scion FR-S Exhaust Flow Bottlenecks

The OEM exhaust assembly on the ZN6 chassis utilizes narrow-diameter, press-bent tubing coupled with a heavy, multi-chambered muffler. Factory press-bends introduce localized internal diameter necking, causing boundary-layer turbulence that impedes mass air flow downstream of the mid-pipe. Over time, the factory mild steel construction is vulnerable to thermal cycling degradation and road salt corrosion, especially at weld seams and hanger connections. Furthermore, excessive internal sound baffling masks the acoustic pulse dynamics of the naturally aspirated FA20 boxer engine while holding back mid-to-high RPM exhaust scavenging efficiency.

The Engineering Solution

Fabricated from mandrel-bent T304 stainless steel, this direct-fit system maintains a constant internal diameter throughout the routing, eliminating restrictive flow bottlenecks to facilitate laminar exhaust gas flow. Continuous TIG welding provides structural durability, preventing thermal fatigue cracks under high-load track conditions. The high-flow muffler design utilizes acoustic packing to balance sound attenuation without inducing flow restriction, unlocking the aggressive boxer cadence. Pre-welded heavy-duty mounting hangers align directly to factory ZN6 subframe rubber bushings, and precision-cut flanges ensure leak-free coupling using standard hardware.

Technical Specifications

Compatibility

• 2013 Scion FR-S Base 2.0L H4 (FA20)
• 2014 Scion FR-S Base 2.0L H4 (FA20)
• 2015 Scion FR-S Base 2.0L H4 (FA20)
• 2016 Scion FR-S Base 2.0L H4 (FA20)

Frequently Asked Questions

Does this fit the ZN6 FR-S?
Yes, this is a direct fit for the 2013-2016 Scion FR-S equipped with the FA20 engine.

Will this catback exhaust trigger a Check Engine Light (CEL)?
No, this assembly mounts downstream of the secondary catalytic converter and O2 sensors, maintaining factory emissions monitor readiness without throwing diagnostic trouble codes.

The Scion Performance Caliber

Engineered to complement the rev-happy, high-compression nature of the rear-wheel-drive ZN6 platform, this catback exhaust delivers the flow efficiency, thermal resistance, and acoustic resonance required for aggressive street and track operation.