Burn Axle Back Muffler For Scion FR-S (2013-2016)

Unleash the Boxer Growl: Burn Axle Back Exhaust for Scion FR-S (FA20/4U-GSE)

Who Is This For? Designed specifically for Scion FR-S owners running the FA20 (4U-GSE) Boxer engine who demand an aggressive track-ready sound and improved exhaust scavenging during high-RPM competition use.

The Muffled Boxer Symptom: From the factory, the ZN6/ZC6 platform is equipped with a massive, heavy "suitcase" style muffler that completely chokes the soul of the FA20 engine. You step on the throttle, but instead of the signature Boxer rumble, you get a vacuum-cleaner hum and a noticeable hesitation in the mid-range torque curve. This restrictive factory setup adds unnecessary weight and creates backpressure that hinders performance during spirited track sessions.

The Engineering Solution: We engineered this Burn Axle Back system to delete the restrictive factory baffles and replace them with high-flow 2.50" OD stainless steel piping. By streamlining the exit path, this kit allows your engine to breathe better, reducing backpressure and shedding significant weight off the rear of the car. The massive 4.50" slanted, double-walled tips aren’t just for show; they provide a resonant chamber that amplifies the raw mechanical symphony of the 2.0L flat-four.

The Comparative Edge: Why This Beats the Competition

• The Performance Gain: Unlike generic universal mufflers that require custom welding, this system is tuned to enhance the FA20’s natural exhaust note while increasing flow for racing and off-road applications.
• Premium Build Quality: Constructed from high-grade Stainless Steel featuring a "Burn Finish" and heavy-duty 3/8" flanges. This prevents the warping and exhaust leaks commonly found on cheaper, thin-flanged alternatives.
• Aggressive Visual Stance: Featuring 4.50" OD slanted, double-walled tips, this kit fills out the factory bumper cutouts much better than the undersized OEM tips or single-walled budget alternatives that discolor unevenly.

Technical Specifications & Factory Ratings

Compatibility & OEM Reference

Fits the Following Vehicles:

• 2013-2016 Scion FR-S (All Trims)
• 2012-2020 Subaru BRZ (All Trims)
• 2012-2020 Toyota 86 (All Trims)

Interchange Part Numbers:

BURN-AB-FRS1220, 2.5-INCH-STAINLESS-AXLEBACK, 4.5-BURN-TIP-EXHAUST

The Performance Promise

Drive with confidence. This exhaust is designed for the enthusiast who values both aesthetics and atmospheric flow. Backed by real automotive experts and fast shipping.

Common Questions

Will this axle-back exhaust fit my Scion FR-S?
Yes, this axle-back system is built for the 2013-2016 Scion FR-S equipped with the 2.0L FA20 (4U-GSE) Boxer engine across all trims.

What are the piping and tip specs on this exhaust?
It is constructed from stainless steel with 2.50-inch OD piping, heavy-duty 3/8-inch flanges, and 4.50-inch OD slanted, double-walled burn-finish tips.

Does this require custom welding to install?
This system is built to bolt directly in place of the factory rear suitcase muffler using 3/8-inch flanges rather than requiring custom welding like universal mufflers.

Which engine platform is this system built for?
This axle-back system is made specifically for the first-generation ZN6 chassis equipped with the 2.0L FA20 (4U-GSE) flat-four engine.

How does this change the sound and weight compared to the factory muffler?
By replacing the heavy, baffled factory suitcase muffler with high-flow 2.50-inch stainless steel piping and 4.50-inch double-walled tips, it sheds rear-end weight, reduces backpressure, and brings out a deeper Boxer exhaust note.