Description
RACING LAB · EXHAUST
GT4-inspired Z-pipe character for the G80 M3 and G82 M4
A dedicated Z-shaped crossover mid-pipe for the BMW S58 twin-turbo exhaust system. The GT4-inspired centre section changes the interaction of the dual exhaust paths to produce a more distinct performance-oriented exhaust character.
GT4 Z
Crossover
S58
Twin turbo
G8X
M3 / M4
Key features
✓Distinct Z-shaped crossover
The alternative centre-pipe geometry influences the interaction of the S58's two exhaust streams.
✓Motorsport-inspired exhaust tone
Designed to give the G80 M3 and G82/G83 M4 a more pronounced, defined exhaust character.
✓Dedicated S58 routing
A vehicle-specific centre-section layout for supported G8X S58 exhaust configurations.
✓Works with a matching rear section
The mid-pipe changes the centre exhaust while retaining a compatible rear silencer arrangement.
Design & construction
The GT4 Z-pipe is a centre-exhaust upgrade rather than a complete turbo-back system. Its shaped crossover changes the pulse interaction in the dual S58 exhaust before the gases reach the rear section, creating a distinct sound character compared with the factory centre-pipe layout.
Fitment & installation
Fit between compatible S58 downpipes and the original or matching aftermarket rear section. Align the exhaust hangers and connection flanges, check heat shielding and underbody clearance, and inspect every joint for leaks after installation.
What's included
- 1 × Racing Lab GT4 Z mid-pipe assembly
Vehicle fitment
BMWG80/G81 M3 — S58 exhaust layout
BMWG82/G83 M4 — S58 exhaust layout
Technical specifications
ProductRacing Lab GT4 Z mid-pipe
LayoutZ-shaped dual-exhaust crossover
ApplicationBMW S58 twin-turbo G8X
SectionCentre exhaust
Fitment information
Public-road use is subject to applicable noise and emissions requirements.
Warranty
All Racing Lab performance parts are covered by a 1-year limited warranty against manufacturing defects and workmanship issues.
Every component is rigorously inspected to ensure quality and reliability, so you can upgrade your vehicle with confidence. If any issues arise, our support team is ready to assist with fast and hassle-free warranty claims.
Return Policies
14-day change-of-mind returns: Available subject to the store's return conditions, including an applicable 20% restocking fee for approved voluntary returns. Please review our full return policy before ordering.
Australian Consumer Law: Your statutory consumer guarantees and remedies are not restricted by this voluntary returns policy or its 14-day period or restocking fee.
Free Shipping
Enjoy fast & free tracked shipping nationwide.
Pro Installation
Want a hassle-free installation? Book or enquire now.
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Why Buy From Racing Lab
Need help confirming fitment? Contact our Sydney team before ordering.
