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 M3 mods and performance parts
931 parts for the G80 BMW M3 (S58 3.0L twin-turbo inline-six), grouped by what you are changing. Each page lists the options by brand and part number and links to the retailer for price and fitment.
Fitment: Listings are read from the retailer's G80 M3 (S58 3.0L) category. Competition, xDrive and Touring (G81) cars can use different parts. Confirm model, drivetrain and model year on the retailer page before ordering.
Exhaust
BMW M3 exhaust systems →
81 parts from 19 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.
BMW M3 downpipes →
7 parts from 5 brands. The downpipe joins the turbocharger outlet to the rest of the exhaust. Aftermarket versions are sold with a high-flow catalytic converter or without one.
BMW M3 exhaust tips →
97 parts from 9 brands. Clamp-on and weld-on exhaust tips. Most are universal parts sized by inlet and outlet diameter, not made for one car.
Engine
BMW M3 intakes →
41 parts from 20 brands. Replacement intake systems, airboxes and filters.
BMW M3 charge pipes →
7 parts from 5 brands. Replacement pipes for the pressurised intake tract between the turbocharger, intercooler and throttle body.
BMW M3 tunes & engine software →
34 parts from 15 brands. Engine and transmission software, flash tuners, piggyback modules and throttle controllers.
BMW M3 intercoolers & charge cooling →
6 parts from 3 brands. Intercoolers, heat exchangers and related charge-cooling parts.
BMW M3 turbochargers & turbo parts →
22 parts from 7 brands. Turbochargers, turbo kits, inlets and related hoses.
BMW M3 fuel & ignition →
57 parts from 18 brands. Fuel pumps, injectors, flex-fuel kits, ignition coils and spark plugs.
BMW M3 cooling upgrades →
35 parts from 6 brands. Radiators, oil coolers, expansion tanks and hoses sold as upgrades.
BMW M3 engine & mounts →
40 parts from 9 brands. Engine and transmission mounts, catch cans, pulleys and internal engine parts.
BMW M3 drivetrain →
13 parts from 7 brands. Axles, driveshafts, differentials and limited-slip units.
Suspension
BMW M3 coilovers →
16 parts from 10 brands. Height-adjustable spring and damper assemblies.
BMW M3 lowering springs →
12 parts from 9 brands. Shorter springs that lower ride height on the factory or aftermarket dampers.
BMW M3 suspension & chassis →
52 parts from 18 brands. Sway bars, control arms, bushings, strut braces, dampers and alignment parts.
Brakes
Wheels
Exterior
BMW M3 front lips & splitters →
19 parts from 8 brands. Front lips and splitters that attach to the lower edge of the front bumper.
BMW M3 spoilers & wings →
23 parts from 10 brands. Trunk spoilers, roof spoilers and wings.
BMW M3 rear diffusers →
11 parts from 6 brands. Rear diffusers and rear bumper trim.
BMW M3 exterior & aero →
64 parts from 18 brands. Grilles, mirror caps, side skirts, emblems and other exterior parts.
Interior & Lighting
BMW M3 interior →
116 parts from 26 brands. Shift paddles, pedals, trim, steering wheels and floor mats.
BMW M3 lighting →
3 parts from 2 brands. Bulbs, lamps, side markers and lighting modules.
BMW M3 track & accessories →
46 parts from 13 brands. Track-day safety items, tow hooks, care products and general accessories.
BMW M3 guides
Modification & Performance Guides · BMW
Best Mods for a Stock BMW M340i: Organized by Goal - M340i Mods
Explore the best first m340i mods, organized by goal, to enhance your BMW M340i's performance and style without breaking the bank.
By Lee Shahin ·
Explore: Modification & Performance Parts
Modification & Performance Guides · BMW
BMW M340i Lowering Springs vs Coilovers for Daily Driving
Compare BMW M340i lowering springs and coilovers for daily driving, covering ride quality, handling, installation complexity, and long-term maintenance costs.
By Lee Shahin ·
Explore: Modification & Performance Parts
Modification & Performance Guides · BMW
BMW M340i Wheel Fitment: Diameter, Width, Offset, Tires
BMW M340i Wheel Fitment guide covering factory wheel diameter, width, offset specifications, compatible tire sizes, and xDrive differences.
By Lee Shahin ·
Explore: Modification & Performance Parts
Modification & Performance Guides · BMW
BMW M340i Front Lip: ABS vs Polyurethane vs Carbon Fiber
Compare BMW M340i front lip materials: ABS, polyurethane, and carbon fiber. Learn fitment requirements, durability differences, and installation considerations.
By Lee Shahin ·
Explore: Modification & Performance Parts
Modification & Performance Guides · BMW
BMW M340i Intake vs Tune: Which Upgrade Should Come First?
Explore whether to upgrade your BMW M340i with an intake or tune first. Understand the benefits and risks of each BMW M340i Intake vs Tune option.
By Lee Shahin ·
Explore: Modification & Performance Parts