BMW M340i Exhaust: Axle-Back vs Cat-Back Comparison
Explore the differences between axle-back and cat-back BMW M340i exhaust systems, focusing on sound, drone, and daily usability for your vehicle.
By Lee Shahin ·
BMW M340i exhaust systems
69 exhaust systems for the G20 BMW M340i (B58 3.0L turbo inline-six) from 13 brands. Cat-back and axle-back systems, mufflers, tips and valve controllers. A cat-back replaces the exhaust from the catalytic converter rearward. An axle-back replaces only the rear section.
Before you order
- Fitment is listed by engine and drivetrain. Confirm both on the retailer page.
- Tip finish and size are often a separate selection on the retailer page.
- Sound-level rules vary by state. A louder system can fail an inspection or roadside check.
- Listings are read from the retailer's G20 M340i (B58 3.0L) category. Many parts fit both rear-wheel-drive and xDrive cars, but not all. Confirm drivetrain, model year and options on the retailer page before ordering.
Brands on this page: Valvetronic Designs (25), AWE (16), ECS (4), Milltek Sport (4), Active Autowerke (3), Dinan (3), MAD (3), Supersprint (3), Enthusiast Bundles (2), Turner Motorsport (2), XForce (2), Eisenmann (1), Genuine BMW M Performance (1).
Cat Back (32)
AWE · Part no. 3810-42018
AWE OE to Quad Tip Conversion Kit - Chrome Silver Tips
Convert your OE style tips to this Quad tip setup in Chrome Silver!
AWE · Part no. 3810-43020
AWE OE to Quad Tip Conversion Kit - Diamond Black Tips
Convert your OE style tips to this Quad tip setup in Diamond Black!
AWE · Part no. 3015G20M340
AWE Touring Edition Exhaust - G2x M340i/440i
Free up power and unleash your BMW's naturally aggressive B58 exhaust tone!
AWE · Part no. 3020G20M340
AWE Track Edition Cat-Back Exhaust System
Free up power and unleash your BMW's naturally aggressive B58 exhaust tone!
AWE · Part no. 3015-42148
Non-Resonated Touring Edition Exhaust - Chrome Silver Tips
An exhaust where performance, sound and drivability come together in harmony
Retailer fitment note: Non-resonated version is suggested for aftermarket downpipe cars.
AWE · Part no. 3015-43156
Non-Resonated Touring Edition Exhaust - Diamond Black Tips
An exhaust where performance, sound and drivability come together in harmony
Retailer fitment note: Non-resonated version is suggested for aftermarket downpipe cars.
AWE · Part no. 3015-11058
Non-Resonated Touring Edition Exhaust - OE Tips
An exhaust where performance, sound and drivability come together in harmony
Retailer fitment note: Non-resonated version is suggested for aftermarket downpipe cars.
AWE · Part no. 3015-42150
Resonated Touring Edition Exhaust - Chrome Silver Tips
An exhaust where performance, sound and drivability come together in harmony
Retailer fitment note: Resonated version is suggested for stock downpipe cars.
AWE · Part no. 3015-43158
Resonated Touring Edition Exhaust - Diamond Black Tips
An exhaust where performance, sound and drivability come together in harmony
Retailer fitment note: Resonated version is suggested for stock downpipe cars.
AWE · Part no. 3015-11060
Resonated Touring Edition Exhaust - OE Tips
An exhaust where performance, sound and drivability come together in harmony
Retailer fitment note: Resonated version is suggested for stock downpipe cars.
AWE · Part no. 3020-42078
Track Edition Exhaust - Chrome Silver Tips
Not for the faint hearted, this track exhaust bellows an exhaust note that is anything but tame. Let your B58 roar loud and proud!
AWE · Part no. 3020-43085
Track Edition Exhaust - Diamond Black Tips
Not for the faint hearted, this track exhaust bellows an exhaust note that is anything but tame. Let your B58 roar loud and proud!
AWE · Part no. 3020-11032
Track Edition Exhaust - OE Tips
Not for the faint hearted, this track exhaust bellows an exhaust note that is anything but tame. Let your B58 roar loud and proud!
Dinan · Part no. G2XM340IM440IEKT
Dinan G2X M340i/M440i Experience Package
Includes all of the Dinan essentials to improve your BMWs power, handlings, and feel
Retailer fitment note: For vehicles with the B58TU (B58D) engine only
Enthusiast Bundles · Part no. 024779LAEBKT
G20 M340i Performance Valved Cat-Back Exhaust & Gloss Black Diffuser
Transform the power, sound, and aesthetics of your M340i!
Enthusiast Bundles · Part no. 024779LAEIEBKT
G20/G22 M340/M440 Performance Valved Cat Back-Exhaust & Carbon Fiber Intake System
Transform the power and sound of your M340i!
MAD · Part no. MAD-5066BL
Catback Exhaust System - Black Tips
Transform the sound and performance of your M340i/M440i!
MAD · Part no. MAD-5066
Catback Exhaust System - Carbon Tips
Transform the sound and performance of your M340i/M440i!
Milltek Sport · Part no. SSXBM1160
Milltek Performance Catback OE Tips
Utilize your factory exhaust tips and trim while gaining sound and performance
Milltek Sport · Part no. SSXBM127
Performance Cat Back Exhaust System
Enhance the sound of your BMW's exhaust with this exhaust system from Milltek Sport
Turner Motorsport · Part no. 024779LA
G20/G22 M340i/M440i Performance Valved Cat-Back Exhaust
Enhance your G Chassis with this beautiful cat-back exhaust from Turner. Full 3.0" design to release the naturally amazing performance and sound of your B58 powered BMW!
Valvetronic Designs · Part no. G20M340VSESBRRC
Valved Sport Cat-Back Exhaust System - Stainless - 3.5" 1x1 Carbon Fiber Tips
Unleash the aggressive sound of your B58!
Valvetronic Designs · Part no. G20M340VSESBRBLK
Valved Sport Cat-Back Exhaust System - Stainless - 3.5" Black Tips
Unleash the aggressive sound of your B58!
Valvetronic Designs · Part no. G20M340VSESBRBRS
Valved Sport Cat-Back Exhaust System - Stainless - 3.5" Brushed Steel Tips
Unleash the aggressive sound of your B58!
Valvetronic Designs · Part no. G20M340VSESBRBRT
Valved Sport Cat-Back Exhaust System - Stainless - 3.5" Burnt Tips
Unleash the aggressive sound of your B58!
Valvetronic Designs · Part no. G20M340VSESBRFC
Valved Sport Cat-Back Exhaust System - Stainless - 3.5" Forged Carbon Fiber Tips
Unleash the aggressive sound of your B58!
Valvetronic Designs · Part no. G20M340IVSESTIRC
Valved Sport Cat-Back Exhaust System - Titanium - 3.5" 1x1 Carbon Fiber Tips
Unleash the aggressive sound of your B58!
Valvetronic Designs · Part no. G20M340VSESTIBLK
Valved Sport Cat-Back Exhaust System - Titanium - 3.5" Black Tips
Unleash the aggressive sound of your B58!
Valvetronic Designs · Part no. G20M340VSESTIBRS
Valved Sport Cat-Back Exhaust System - Titanium - 3.5" Brushed Steel Tips
Unleash the aggressive sound of your B58!
Valvetronic Designs · Part no. G20M340VSESTIBRT
Valved Sport Cat-Back Exhaust System - Titanium - 3.5" Burnt Tips
Unleash the aggressive sound of your B58!
Valvetronic Designs · Part no. G20M340VSESTIFC
Valved Sport Cat-Back Exhaust System - Titanium - 3.5" Forged Carbon Fiber Tips
Unleash the aggressive sound of your B58!
Valvetronic Designs · Part no. G20M340VSESTTBRT
Valved Sport Cat-Back Exhaust System - Titanium - 4" Raw Titanium Burnt Tips
Unleash the aggressive sound of your B58!
Mufflers (13)
ECS · Part no. 044081LA01
Build-Your-Own Universal Vacuum-Actuated Valved Mufflers Kit
Choose between a 2.5" or 3.0" valved mufflers to complete your custom exhaust.
Valvetronic Designs · Part no. UVM63MMTSTYLEX1
Universal T-Style Valved Muffler Kit - Single Inlet / Dual Outlet - 2.5" (63mm) - 1 Muffler
Upgrade your ride with the Valvetronic Designs universal valve muffler kit, a premium T304 stainless steel solution that delivers an aggressive, valved exhaust note at the click of a button
Valvetronic Designs · Part no. UVM76MMTSTYLEX1
Universal T-Style Valved Muffler Kit - Single Inlet / Dual Outlet - 3.0" (76mm) - 1 Muffler
Upgrade your ride with the Valvetronic Designs universal valve muffler kit, a premium T304 stainless steel solution that delivers an aggressive, valved exhaust note at the click of a button
Valvetronic Designs · Part no. UVM63MMDUALOUTX1
Universal Valved Muffler Kit - Single Inlet / Dual Outlet - 2.5" (63mm) - 1 Muffler
Upgrade your ride with the Valvetronic Designs universal valve muffler kit, a premium T304 stainless steel solution that delivers an aggressive, valved exhaust note at the click of a button
Valvetronic Designs · Part no. UVM63MMDUALOUTX2
Universal Valved Muffler Kit - Single Inlet / Dual Outlet - 2.5" (63mm) - 2 Mufflers
Upgrade your ride with the Valvetronic Designs universal valve muffler kit, a premium T304 stainless steel solution that delivers an aggressive, valved exhaust note at the click of a button
Valvetronic Designs · Part no. UVM76MMDUALOUTX1
Universal Valved Muffler Kit - Single Inlet / Dual Outlet - 3.0" (76mm) - 1 Muffler
Upgrade your ride with the Valvetronic Designs universal valve muffler kit, a premium T304 stainless steel solution that delivers an aggressive, valved exhaust note at the click of a button
Valvetronic Designs · Part no. UVM76MMDUALOUTX2
Universal Valved Muffler Kit - Single Inlet / Dual Outlet - 3.0" (76mm) - 2 Mufflers
Upgrade your ride with the Valvetronic Designs universal valve muffler kit, a premium T304 stainless steel solution that delivers an aggressive, valved exhaust note at the click of a button
Valvetronic Designs · Part no. UVM.63MM.X1
Universal Valved Muffler Kit - Single Inlet / Single Outlet - 2.5" (63mm) - 1 Muffler
Upgrade your ride with the Valvetronic Designs universal valve muffler kit, a premium T304 stainless steel solution that delivers an aggressive, valved exhaust note at the click of a button
Valvetronic Designs · Part no. UVM.63MM.X2
Universal Valved Muffler Kit - Single Inlet / Single Outlet - 2.5" (63mm) - 2 Mufflers
Upgrade your ride with the Valvetronic Designs universal valve muffler kit, a premium T304 stainless steel solution that delivers an aggressive, valved exhaust note at the click of a button
Valvetronic Designs · Part no. UVM.76MM.X1
Universal Valved Muffler Kit - Single Inlet / Single Outlet - 3.0" (76mm) - 1 Muffler
Upgrade your ride with the Valvetronic Designs universal valve muffler kit, a premium T304 stainless steel solution that delivers an aggressive, valved exhaust note at the click of a button
Valvetronic Designs · Part no. UVM.89MM.X2
Universal Valved Muffler Kit - Single Inlet / Single Outlet - 3.0" (76mm) - 2 Mufflers
Upgrade your ride with the Valvetronic Designs universal valve muffler kit, a premium T304 stainless steel solution that delivers an aggressive, valved exhaust note at the click of a button
Valvetronic Designs · Part no. UVM.76MM.X2
Universal Valved Muffler Kit - Single Inlet / Single Outlet - 3.0" (76mm) - 2 Mufflers
Upgrade your ride with the Valvetronic Designs universal valve muffler kit, a premium T304 stainless steel solution that delivers an aggressive, valved exhaust note at the click of a button
Valvetronic Designs · Part no. UVM.89MM.X1
Universal Valved Muffler Kit - Single Inlet / Single Outlet - 3.5" (89mm) - 1 Muffler
Upgrade your ride with the Valvetronic Designs universal valve muffler kit, a premium T304 stainless steel solution that delivers an aggressive, valved exhaust note at the click of a button
Axle Back (11)
Active Autowerke · Part no. 11-089B
M340i Valved Rear Exhaust W Black Tips
Get the exhaust growl your car should have came with from the factory!
Active Autowerke · Part no. 11-089C
M340i Valved Rear Exhaust W Carbon Tips
Get the exhaust growl your car should have came with from the factory!
Active Autowerke · Part no. 11-089
Valved Axle-Back Exhuast With Stainless Brushed Tips
Get the exhaust growl your car should have came with from the factory!
Dinan · Part no. D660-0085-BLK
Dinan Free Flow Axle-Back Exhaust - Black Tips
Dinan has developed this Free Flow stainless exhaust to increase flow by reducing backpressure
Dinan · Part no. D660-0085
Dinan Free Flow Axle-Back Exhaust - Polished Tips
Dinan has developed this Free Flow stainless exhaust to increase flow by reducing backpressure
Eisenmann · Part no. B5465.00904.11
Eisenmann Sport Performance Muffler System - Chrome Tips
Stay ahead of the competition with the performance gains that you'll receive from this sport exhaust system.
Genuine BMW M Performance · Part no. 18302464492
M Performance Muffler
Milltek Sport · Part no. SSXBM115X
Milltek Performance Axleback Exhaust System
Motorsport pedigree. Superior quality. Excellent sound. Milltek Sport Axle-back exhaust for enhanced performance.
Supersprint · Part no. 049804
Performance Muffler - OEM Tips - Non-Valved
Supersprint · Part no. 049926
Supersprint G2x B58 3.0L Rear Exhaust - Quad - Non-Valved
Supersprint exhaust is widely recognized as the leader in complete exhaust system upgrades - extremely high quality, well designed for optimal flow, and amazing sound. Even at a premium price Supersprint is an unbeatable
Turner Motorsport · Part no. 044826LA
G2X M340i/M440i Muffler Delete
Add an aggressive exhaust note without breaking the bank! Engineered for factory-like fitment, increased flow, and easy installation.
Valve Controller (7)
ECS · Part no. 004788LA01
Remote Vacuum Exhaust Valve Control Kit
Control your exhaust valves with the click of a button! Includes a standalone vacuum pump, wiring, vacuum hose, and controllers.
MAD · Part no. MAD-144
MAD Exhaust Valve Controller Essential
Manually control muffler valve funtions with the click of a button with this plug and play kit
Retailer fitment note: For vehicles with electronic valves only
Milltek Sport · Part no. SSXBM1275
Active Valve Control
Easy change the volume of your exhaust with the push of a button!
Valvetronic Designs · Part no. VTD.EVH
Electronic Exhaust Valve Control Kit - 1 Valve Actuator + 1 Valve To Controller Wire
Enables the control of a single electronic exhaust valve
Retailer fitment note: Please visually confirm the exhaust valve actuator installed on your vehicle prior to purchase or installation - Only compatible with systems requiring a single electric valve actuator
Valvetronic Designs · Part no. VTD.EVH.2
Electronic Exhaust Valve Control Kit - 2 Valve Actuators + 2 Valve To Controller Wires
Enables the control of two electronic exhaust valves
Retailer fitment note: Please visually confirm the exhaust valve actuator installed on your vehicle prior to purchase or installation - Only compatible with systems requiring two electric valve actuators
XForce · Part no. VK05-ACTUATOR
XForce Varex Toggle Switch
Control your Varex valve with the press of a button
XForce · Part no. VKSB01-ECU-MODUL
Xforce Smartbox Varex Muffler ECU Upgrade Module
Manually and automatically adjust the exhaust sound level
Complete System (4)
AWE · Part no. 3820-11056
AWE Resonated To Non-Resonated Conversion Kit For G20 M340i
The AWE Tuning Resonated-to-Non-Resonated Conversion Kit allows you to transition your existing AWE resonated mid-pipes to a non-resonated configuration.
AWE · Part no. 3820-11054
AWE Touring-to-Track Edition Conversion Kit
Transform the auditory footprint of your BMW with the AWE Touring-to-Track Edition Conversion Kit.
AWE · Part no. 3815-11058
AWE Track-to-Touring Edition Conversion Kit
This AWE Conversion Kit allows you to easily transform your Track exhaust system into a drone-free Touring setup without replacing the entire cat-back.
Supersprint · Part no. G20M340B58
Supersprint Performance Exhaust System
Good looks, great sound, and staggering performance!
Cutout (2)
ECS · Part no. 020923ECS02
Build-Your-Own Universal Vacuum-Actuated Exhaust Cutout Kit - Dual Cutouts
Increase HP/TQ and activate a full race exhaust with the flip of a switch, with our ECS Vacuum-Actuated Exhaust Cutouts
ECS · Part no. 020923ECS01
Build-Your-Own Universal Vacuum-Actuated Exhaust Cutout Kit - Single Cutout
Increase HP/TQ and activate a full race exhaust with the flip of a switch, with our ECS Vacuum-Actuated Exhaust Cutout
Guides for this decision
More BMW M340i parts
- BMW M340i downpipes
- BMW M340i exhaust tips
- BMW M340i intakes
- BMW M340i charge pipes
- BMW M340i tunes & engine software
- BMW M340i intercoolers & charge cooling
- BMW M340i turbochargers & turbo parts
- BMW M340i fuel & ignition
- BMW M340i cooling upgrades
- BMW M340i engine & mounts
- BMW M340i drivetrain
- BMW M340i coilovers
- BMW M340i lowering springs
- BMW M340i suspension & chassis
- BMW M340i brake upgrades
- BMW M340i wheels
- BMW M340i wheel spacers & hardware
- BMW M340i front lips & splitters
- BMW M340i spoilers & wings
- BMW M340i rear diffusers
- BMW M340i exterior & aero
- BMW M340i interior
- BMW M340i lighting
- BMW M340i track & accessories