Carbon Fiber GTX Rear Diffuser – BMW G80 M3 / G82 G83 M4
The GTX 5 Piece Carbon Fiber Rear Diffuser for the BMW G80 M3 and G82 / G83 M4 is designed for owners who want a more aggressive rear profile while maintaining the precision fitment expected from premium aftermarket aero components. With its multi-piece configuration and motorsport-inspired geometry, this diffuser transforms the rear of the G8X platform with a sharper, more purposeful presence.
Unlike traditional single-piece diffusers, the GTX 5-piece configuration creates deeper visual separation between the center and outer sections, giving the rear bumper a far more sculpted appearance. The result is a diffuser design that adds both visual depth and a race-inspired aesthetic that complements the aggressive body lines of the G80 M3 and G82 / G83 M4.
Each section is engineered to integrate seamlessly with the factory rear bumper profile, preserving OEM-level alignment while dramatically enhancing the rear aerodynamics of the vehicle.
⸻
Key Features
• 5 piece carbon fiber diffuser
• Constructed from real carbon fiber with a 2×2 twill weave pattern
• Lightweight yet rigid—designed to preserve structural form under dynamic conditions
• Adds functional lighting and bold visual presence with OEM+ precision
• Matte and forged carbon options available upon request
⸻
Compatible Models
• BMW G80 M3 Sedan (2021–Present) — both Base & Competition models
• BMW G82 M4 Coupe (2021–Present)
• BMW G83 M4 Convertible (2021–Present)
Fitment spans both Pre‑LCI and LCI bumper variants.
⸻
What’s Included
• (1) Carbon Fiber 5 piece Rear Diffuser
• Installation hardware not included on most products
⸻
Why Buy From Eterna Motorworks
Eterna Motorworks is the standard in premium aftermarket automotive parts and services. With over a decade of hands-on experience, we’ve earned the trust of enthusiasts and professional builders worldwide by delivering unmatched quality, precision fitment, and long-term credibility. Every part and service we offer is curated to meet the highest expectations in styling, performance, and reliability — both on the road and in the shop.
If you’re searching for a trusted partner to set your build apart — welcome to the team.
⸻
Professional installation is highly recommended.
Installation hardware not included on most products.
For full fitment, installation, and store policy details, please refer to our policies before purchasing.
Worldwide shipping available upon request.
⸻
Your next mod starts here. Upgrade your build the right way with Eterna Motorworks.
Product Information
Product Information
Shipping & Returns
Shipping & Returns
Carbon Fiber GTX Rear Diffuser – BMW G80 M3 / G82 G83 M4
Carbon Fiber GTX Rear Diffuser – BMW G80 M3 / G82 G83 M4
The GTX 5 Piece Carbon Fiber Rear Diffuser for the BMW G80 M3 and G82 / G83 M4 is designed for owners who want a more aggressive rear profile while maintaining the precision fitment expected from premium aftermarket aero components. With its multi-piece configuration and motorsport-inspired geometry, this diffuser transforms the rear of the G8X platform with a sharper, more purposeful presence.
Unlike traditional single-piece diffusers, the GTX 5-piece configuration creates deeper visual separation between the center and outer sections, giving the rear bumper a far more sculpted appearance. The result is a diffuser design that adds both visual depth and a race-inspired aesthetic that complements the aggressive body lines of the G80 M3 and G82 / G83 M4.
Each section is engineered to integrate seamlessly with the factory rear bumper profile, preserving OEM-level alignment while dramatically enhancing the rear aerodynamics of the vehicle.
⸻
Key Features
• 5 piece carbon fiber diffuser
• Constructed from real carbon fiber with a 2×2 twill weave pattern
• Lightweight yet rigid—designed to preserve structural form under dynamic conditions
• Adds functional lighting and bold visual presence with OEM+ precision
• Matte and forged carbon options available upon request
⸻
Compatible Models
• BMW G80 M3 Sedan (2021–Present) — both Base & Competition models
• BMW G82 M4 Coupe (2021–Present)
• BMW G83 M4 Convertible (2021–Present)
Fitment spans both Pre‑LCI and LCI bumper variants.
⸻
What’s Included
• (1) Carbon Fiber 5 piece Rear Diffuser
• Installation hardware not included on most products
⸻
Why Buy From Eterna Motorworks
Eterna Motorworks is the standard in premium aftermarket automotive parts and services. With over a decade of hands-on experience, we’ve earned the trust of enthusiasts and professional builders worldwide by delivering unmatched quality, precision fitment, and long-term credibility. Every part and service we offer is curated to meet the highest expectations in styling, performance, and reliability — both on the road and in the shop.
If you’re searching for a trusted partner to set your build apart — welcome to the team.
⸻
Professional installation is highly recommended.
Installation hardware not included on most products.
For full fitment, installation, and store policy details, please refer to our policies before purchasing.
Worldwide shipping available upon request.
⸻
Your next mod starts here. Upgrade your build the right way with Eterna Motorworks.
Original: $1,995.00
-70%$1,995.00
$598.50Product Information
Product Information
Shipping & Returns
Shipping & Returns
Description
The GTX 5 Piece Carbon Fiber Rear Diffuser for the BMW G80 M3 and G82 / G83 M4 is designed for owners who want a more aggressive rear profile while maintaining the precision fitment expected from premium aftermarket aero components. With its multi-piece configuration and motorsport-inspired geometry, this diffuser transforms the rear of the G8X platform with a sharper, more purposeful presence.
Unlike traditional single-piece diffusers, the GTX 5-piece configuration creates deeper visual separation between the center and outer sections, giving the rear bumper a far more sculpted appearance. The result is a diffuser design that adds both visual depth and a race-inspired aesthetic that complements the aggressive body lines of the G80 M3 and G82 / G83 M4.
Each section is engineered to integrate seamlessly with the factory rear bumper profile, preserving OEM-level alignment while dramatically enhancing the rear aerodynamics of the vehicle.
⸻
Key Features
• 5 piece carbon fiber diffuser
• Constructed from real carbon fiber with a 2×2 twill weave pattern
• Lightweight yet rigid—designed to preserve structural form under dynamic conditions
• Adds functional lighting and bold visual presence with OEM+ precision
• Matte and forged carbon options available upon request
⸻
Compatible Models
• BMW G80 M3 Sedan (2021–Present) — both Base & Competition models
• BMW G82 M4 Coupe (2021–Present)
• BMW G83 M4 Convertible (2021–Present)
Fitment spans both Pre‑LCI and LCI bumper variants.
⸻
What’s Included
• (1) Carbon Fiber 5 piece Rear Diffuser
• Installation hardware not included on most products
⸻
Why Buy From Eterna Motorworks
Eterna Motorworks is the standard in premium aftermarket automotive parts and services. With over a decade of hands-on experience, we’ve earned the trust of enthusiasts and professional builders worldwide by delivering unmatched quality, precision fitment, and long-term credibility. Every part and service we offer is curated to meet the highest expectations in styling, performance, and reliability — both on the road and in the shop.
If you’re searching for a trusted partner to set your build apart — welcome to the team.
⸻
Professional installation is highly recommended.
Installation hardware not included on most products.
For full fitment, installation, and store policy details, please refer to our policies before purchasing.
Worldwide shipping available upon request.
⸻
Your next mod starts here. Upgrade your build the right way with Eterna Motorworks.