AWE Tuning (Track and Touring)

• Track: Loud and raw. Deletes the rear resonator for max sound. You'll hear more turbo and more exhaust, but it can drone at highway speeds.
• Touring: Uses AWE's 180 Technology to cancel drone, so you get a balanced, refined tone that's happy as a daily.
• Full 3" catback with an integrated 3" front pipe. Dyno-proven gains up to 14 HP and 13 ft-lbs at the wheels on a stock downpipe.

HKS Legamax Premium

• Japanese engineering with a valveless, straight-through design that drops exhaust pressure by 30% versus stock.
• Sound is clean, deep, and JDM-refined. Perfect for daily street use without being obnoxious.
• Includes an actuator so the valveless setup doesn't throw a check engine light. This is the quieter HKS. See the Hi-Power below for the loud sibling.

HKS Hi-Power

• The loud sibling to the Legamax. HKS turned the volume up here: 13 dB over stock and 9 dB over the Legamax Sports.
• Valveless with a bullet-shaped silencer that pushes both bass and treble hard. The note builds with RPM, so the harder you push, the better it sounds.
• 75mm main pipe, full straight-through, same 30% pressure drop as the Legamax. Gains above stock from 5,000 to 6,000 RPM with up to 7.5 Nm more torque around 3,000 RPM.
• 119mm titanium tips. Sound level is 93 dB versus 80 dB stock. Not a 6AM friend, but not quite Tomei territory either. A solid middle ground.

Remark (Race and Touring)

• Race: Raw and aggressive with straight-through piping, but honestly not as loud as you'd expect. Sporty and liveable.
• Touring: Bigger mufflers for a smoother, deeper sound that's daily-drivable and still has an edge.
• Also comes in a Triple Tip layout and a full titanium catback with SUS304 front pipe if you want the top-shelf Remark.

Invidia R400

• 3" mandrel-bent stainless with quad titanium tips.
• Deep, punchy tone that's become the signature sound of this platform. Some owners get more drone than a Touring-style system, but wide-open throttle is hard to beat.
• Valved, so it keeps factory valve operation through the stock actuator. Great fitment and clean welds.

Invidia Q300

• The R400's calmer sibling. Noticeably quieter than both the R400 and N1, but still flows plenty for real gains.
• Tuned baffles and resonators give it a rich, deep note without drone or cabin boom. The mature enthusiast Invidia.
• Same 1.5mm 304 stainless, minimal bends, triple 101mm straight-cut tips in titanium or black.
• If you love Invidia's value but your commute is longer than 20 minutes, get this over the R400.

Apexi N1 Evolution Extreme

• 75mm to dual 61mm layout with titanium dual-wall tips.
• Smooth and deep on the cruise, aggressive edge at full throttle. Great for spirited driving.
• Best sounding exhaust out there, in my book.

Spoon N1

• This is what was on our own SBX Performance FL5.
• 70mm front pipe and dual 80mm straight-through rears with minimal baffling.
• Deep and tame on the cruise, then it wakes up with raw JDM tone when you get on it. Light and motorsport-focused.

GReddy Supreme SP

• Hand-welded 304 stainless with 4.5" dual tips.
• Deep and mellow. Comfortable for long drives but still sporty under load.
• Great OEM+ feel with a clean look.

GReddy Power Extreme R

• The loud GReddy. Where the Supreme SP is the mellow OEM+ pick, this one turns up the volume and the attitude.
• SUS304 stainless, full TIG welds, 70mm single into a dual 60mm layout so it flows on stock, boost-up, or turbine-swapped builds.
• Bold dual 115mm heat-gradient (blue) tips give it a rear end that stands out from the sea of straight-cut tips.
• 93 dB at 3,500 RPM versus about 81 dB stock. Fully bolt-on, no mods needed.

Mugen

• Ultra-rare OEM+ option with build quality to match the name.
• Refined and smooth with a sporty edge. Blends into daily life easily.

Milltek Sport

• Comes in Race (loud) and Resonated (quieter), so you pick your volume.
• Multiple tip finishes: polished, black, burnt, and titanium-look.
• Balanced Euro tone, popular for how versatile it is.

MagnaFlow SPEQ Series

• A well-known American brand a lot of FL5 owners skip right over. The SPEQ is built around one thing: sound without the drone.
• Patented No Drone Technology resonators kill the highway hum. Owners report no drone even at 80 mph. If drone is your biggest fear, this belongs on your short list.
• Mandrel-bent stainless, straight-through muffler, tri-tip design with quad carbon fiber tips for a clean rear look.
• Keeps the factory valve, so it's quiet in Comfort and opens up in Sport and +R just like stock. Lighter than the factory exhaust too.

Tomei Expreme Ti Type D

• Full titanium, so it's incredibly light.
• That signature titanium scream at high RPM.
• Not for quiet neighborhoods, but perfect for track and enthusiast builds.

Fujitsubo Authorize RM+C

• Iconic Japanese brand known for quality welds and a quiet-but-capable race tone.
• Full titanium with carbon fiber 118mm tips. The muffler chambers give it a great sound valve-closed and a real scream valve-open.
• Refined, clean looks, low drone, balanced powerband.

Boost Logic Titanium

• Full titanium without the JDM halo price. Full 3" flow throughout, all titanium, and it weighs just 16.75 lbs. That's a huge drop from stock.
• Non-valved with dual free-flowing mufflers standard. Simple, light, built to move air.
• Priced well under the JDM titanium names, which makes it genuinely strong value for a full titanium system. No boutique name recognition, but the weight and flow numbers speak for themselves. Email us for current pricing.

PLM (Private Label Mfg) Titanium

• PLM's full titanium play. PLM built its name on value pricing, but be honest with yourself here: at $4,495 this isn't the cheap titanium option anymore.
• Fits the FK8 and FL5, so it's a proven design carried forward. Light titanium build with a raw, aggressive tone.
• Eyes open here: it's not a hand-built JDM piece, and the Tomei Type-D costs less. Cross-shop both before you buy.

27WON Valved

• The biggest pipe on the market: 80mm (3.125") all the way through to the tips. No step-downs, no restriction. A true full-diameter system.
• Available as a catback or full turboback. 27WON is the only brand right now with a complete turbo-to-tip solution for the FL5.
• Valved and tied into the factory drive modes. Comes non-resonated (for a stock downpipe) or resonated (if you're running an aftermarket downpipe).
• Thick 3-bolt flanges everywhere and a full hardware kit. Owners consistently rave about the fit and finish.
• Downsides? A few reported fitment issues, and it's HEAVY. Not suited for track use, in my opinion.

Borla (Touring, S-Type and ATAK)

• Borla gives you three sound levels for the FL5, so you dial in exactly how loud you want to be. Touring is the quietest and safest if you drive far or leave early. S-Type is deeper and more aggressive but still livable. ATAK is the loudest, for when you want the car to announce itself.
• T-304 stainless. The ATAK is head-turning without drone thanks to Borla's Polyphonic Harmonizer, where pipes of different sizes inside the muffler layer the note for a clean, full-bodied sound.
• Valved, keeps factory valve operation with an included harness extender. Triple tip layout (dual 4" outers, 4.5" center) in polished, ceramic black, or carbon fiber.
• Backed by Borla's Million-Mile Warranty. They don't mess around with coverage.

Remus Valved

• Austrian-engineered with a big reputation from the FK8, where it was widely called the best all-around exhaust. The FL5 version carries that DNA forward.
• 76mm piping (up from 60mm stock) with a valved design that uses the original actuator through the car's own electronics. No aftermarket controllers, no modifications. Your dash controls and drive modes just work.
• Tip options include stainless, brushed titanium, black titanium, and carbon fiber with titanium internals. One of the most customizable systems out there.
• EU-homologated for street-legal use in Europe, one of the only FL5 exhausts that carries official certification. That tells you something about the engineering.
• Deep and sonorous on the cruise, assertive under load, without the drone that plagues more aggressive setups.

Armytrix Valvetronic

• Full valvetronic with a twist. Its auto function opens and closes the valves based on RPM and throttle position, and you can customize that behavior in their Bluetooth app.
• Over 60% lighter than stock. T304 stainless with precision TIG hand-welding throughout.
• Valves closed, it stays quiet and holds backpressure for low-RPM torque. Valves open, it's basically straight pipe. The loudest a valved system gets.
• This is the pick for the tech-forward owner who wants granular control. Multiple tip finishes.

Fi Exhaust (Frequency Intelligent)

• Valvetronic catback in high-grade T304. Valve closed routes exhaust through the muffler for a comfortable daily. Valve open bypasses it for an intense soundtrack.
• Works with the factory sport button and drive modes, or their optional Fi Pro remote for manual switching.
• Fi claims 5 to 10% more HP on a full catless setup (downpipe plus catback). Muffler internals are designed specifically for the FL5.
• Big in the Euro and JDM scene, less common on FL5s, so it stands out at meets.

MXP Comp RS

• 3" stainless with mandrel bends and a working exhaust valve at the OEM location.
• The star feature is the Helmholtz resonator, a chamber built specifically to kill highway drone. If you've ever had an exhaust that sounded amazing in a parking garage and miserable at mile 200, this is MXP's answer.
• Dual 110mm tips, clean rear profile. Community feedback is overwhelmingly positive: daily-friendly without giving up the WOT experience.
• Front pipe sold separately.

MBRP Street and Pro Series

• MBRP has been a heavy hitter in the truck and off-road world for years, and they bring that same mandrel-bent, dyno-tested approach to the FL5.
• 3" mandrel-bent catback in Street (moderate, daily-friendly) or Pro Series (louder, carbon fiber tips).
• Quality construction without the JDM import premium. Good pick if you want better sound and flow without breaking the bank.

Berk Technology

• A motorsport-focused American brand that flies under the radar but has real track pedigree across Honda, Nissan, and Toyota.
• Built for flow and light weight with a race-first, no-gimmicks philosophy. Clean, functional hardware aimed at track use.
• If you're a track-day regular who cares more about a well-built system than tip finishes and app-controlled valves, Berk is worth a look. Reach out for current spec and availability.

J's Racing ZX Full Titanium

• This is the halo piece. Full titanium alloy, 1mm wall thickness throughout, and the whole system weighs just 10.5 kg. Absurdly light.
• 76.3mm center pipe into dual 60.5mm outlets, capped with the signature dual 120mm burnt titanium Dolphin Tail tips. The rear view alone sells some people.
• Fully straight-through and valveless, built for rapid boost build-up and sustained top end. Each one is handmade with precision circular-cut welding. You can see the quality in the welds.
• Sound is dry and aggressive. Think race car. Not a quiet-morning system. It's built to win time attack and make grown adults stare in a parking lot.
• Includes a stock actuator relocation kit to avoid a CEL. Tuning recommended.
• Special order, roughly 3-month ETA. Special orders are final sale. Email us for current pricing.

J's Racing X304 Stainless 70RS

• J's Racing's more accessible option, and "accessible" is relative when we're talking J's Racing. 1.5mm stainless that's still lighter than OEM, with titanium alloy tips.
• 75mm center pipe to dual 60.5mm outlets with the same 120mm Dolphin Tails. Fully straight-through, single main silencer for aggressive flow.
• J's Racing claims around 7 PS (about 7 HP). Quick boost build with extended power up top.
• Sound is a piercing high-pitch note from the 2.0L turbo. They recommend their HYPER-ECU for the full effect, but it performs well on its own.
• If the ZX Titanium is the dream, the X304 is the reality. Same DNA, same Dolphin Tails, same handcrafted quality, roughly half the price. Email us for current pricing.

Cobra Sport (Turbo-Back, Cat-Back and Front Flex-Back)

• UK-engineered with a full lineup for the FL5, and more configuration options than almost anyone. Turbo-back, cat/GPF-back, or front flex-back, each in non-resonated valved form.
• All systems use 3" (76.2mm) pipework with the factory valve retained, so drive modes change the tone just like stock. No third-party controllers. Includes a redesigned heat shield to clear the larger piping.
• The turbo-back comes with either a 200-cell high-flow sports cat or a de-cat setup. Tips in 4" polished stainless, ceramic black, or carbon fibre.
• Cobra is one of the few brands that publishes real numbers. Cat/GPF-back: 88 dB at 3,500 RPM (+16.7 over stock), 2.7 kg lighter. Front flex-back: 87.9 dB at 3,500 RPM, 1.35 kg lighter. That transparency is appreciated.
• Note: the turbo-back and sports cat options remove the PPF and will need ECU tuning at fitment.

• RV6 Front Pipe: 3.0" stainless, CNC bent, made in the USA. View on SBX ($399)
• PRL Front Pipe: TIG-welded, precision fitment, great flow. View on SBX ($429)
• Invidia 76mm Front Pipe: Mandrel-bent 304 stainless, made for Invidia catbacks but works with other 3" systems. Solid value. Email us
• MXP Front Pipe: Made to pair with the MXP Comp RS. 3" stainless, quality welds. View on SBX ($400)
• PLM Front Pipe: the budget option for the front section. View on SBX ($299)

A catback is mostly sound and weight. If you want real gains, the downpipe is where the restriction lives, and it needs a tune either way.

• SBX GESI Catted Downpipe: our own, built in the US by BS Fab with a GESI cat. 5.0 psi mean backpressure (5,000 to 6,750 rpm) at about 22 psi boost, and +12.5 whp in a back-to-back DE5 test. Made to order. Not CARB legal, so California orders are track use only. $1,579.99
• SBX Competition Downpipe: catless, off-road use only, and not sold to California.
• Add the SBX 6" O2 extension harness, the SBX x PTP downpipe blanket, and a titanium stud kit while it's all apart.