the next chapter

Quad exit. Your move.

The G8X rear end was made for a proper quad setup.

Shop the Ventarii system →
BMW G80 · G82 · G83 — S58 valved system

the next chapter
of driving

A valved exhaust system built specifically for the G8X platform. Quiet past the neighbours. Unmistakable everywhere else.

Shop the G8X system Hear it first
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The switch is the product

Two exhausts.
One system.

Valve closed, it's civilised — refined enough for a 6am street exit. Valve open, the S58 finally sounds like what it is. Flip the switch to hear the difference.

Valve closedRefined burble · no cabin drone · neighbour-approved
Valve openFull volume · overrun crackle · launch-control ready
Closed Open
78dB @ idle-adjacent
Refinedcharacter

Both modes play real S58 recordings

Why it sounds the way it does

Built around the S58,
not adapted to it

T304stainless

Material that lasts

Full T304 stainless construction, TIG-welded. Corrosion resistance for Australian conditions and a brighter tone signature than mild-steel systems.

2modes

Valved, not compromised

Most systems make you choose loud or quiet at purchase. Electronic valves with a dedicated valve controller mean you choose every time you drive.

G8Xspecific

Direct bolt-on fitment

Designed on the G80/G82/G83 chassis. Factory hanger points, no cutting, no adapters — a clean install your workshop will thank you for.

The hardware

Every weld,
on the record

Shot on black in our Melbourne studio. What you see is what bolts to your car.

Complete system
Complete systemFull valved cat-back with X-pipe and quad carbon tips · direct G8X fitment
Valve actuators
Valve actuatorsElectronic control via the included valve controller — open or closed on demand
X-pipe crossover
X-pipe crossoverBalances pulses between banks — smoother note, no drone
Valved rear section
Valved rear sectionStraight-through muffler with twin electronic valves · OEM hanger points
Laser-etched. Not stickered.
Laser-etched. Not stickered.Permanent marking on every muffler body — no badges to peel or fade
Sound comparison

Don't take our word for it.
Take our microphone's.

Recorded on the same car with the same microphone. Real S58 captures — hear the valve do its work.

Factory OPF

Stock exhaust

Real recording — factory OPF. You paid for a straight-six you can barely hear.

Ventarii · valve closed

Daily mode

Real recording — S58, valves closed. Deeper tone, street-friendly.

Ventarii · valve open

Full volume

Real recording — S58, valves open. Overrun crackle included.

Ventarii G8X Valved Exhaust System
G80 · G82 · G83 M3 / M4

Ventarii G8X
Valved Exhaust System

$3,750.00 AUD
Free AU shipping · In stock in Melbourne
Construction
T304 stainless, TIG-welded
Configuration
Valved cat-back, quad exit
Control
Included 2 valve controllers
Fitment
Bolt-on, OEM hangers
Install time
≈ 2.5 hrs at any workshop
Tip finish
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Buy with confidence

Melbourne engineered.
Enthusiast owned.

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Fitment guarantee

Confirmed G80/G82/G83 fitment before dispatch. Wrong fit? We make it right.

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Direct support

DM us on Instagram and you're talking to the founder — not a ticket queue.

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Workshop-friendly install

Full install guide included. Any performance workshop can fit it in an afternoon.

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Secure checkout

Shopify Payments — Apple Pay, Google Pay, all major cards. Ships insured.