The GRAIL Valved Exhaust System for BMW M3 and M4 (G8x) enhances the S58 engine with a deeper, more aggressive tone while maintaining daily comfort. Precision-built in Germany, it delivers improved exhaust flow, refined acoustics, and a perfect balance between performance and usability.
Specifications:
System type: Valved cat-back exhaust system
Material: High-quality L304 stainless steel
Pipe design: Full mid-pipe with dual 3-inch rear section
Valve system: CNC-machined performance valves
Sound modes: Dual mode (open / closed)
Approval: ECE approved (road legal in EU)
Compatibility:
Suitable for BMW M3 (G80 / G81)
Suitable for BMW M4 (G82 / G83)
Model years: 2021+
Features:
Aggressive turbo sound with minimal drone
Dual-mode valve control for comfort or performance
Flow-optimized design for better response
Plug-and-play installation
Handcrafted in Germany for premium quality
Ideal for drivers wanting a louder, more refined exhaust note, this GRAIL system delivers strong sound, improved flow, and OEM-level fitment.
Juan Patterson (verified owner) –
The exhaust note turns heads everywhere I go.
Jeremy Rivera (verified owner) –
The build quality exceeded my expectations.
David Jones (verified owner) –
Everything lined up perfectly during install.
Ashley Gonzales (verified owner) –
The quality of the materials is excellent and feels very durable.
Timothy Sanchez (verified owner) –
Fitment was spot on with no modifications needed.
Rachel Woods (verified owner) –
Perfect balance between performance and comfort.
Peter Rogers (verified owner) –
The sound is rich and powerful.
William Brown (verified owner) –
The tone is deep and sporty at all RPMs.
Melissa Alexander (verified owner) –
The sound is smooth and not overly loud.
Kenneth Martin (verified owner) –
Great upgrade for both sound and performance.
Gary Walker (verified owner) –
The exhaust note is deep and refined, not too loud.
Benjamin Baker (verified owner) –
The tone is clean and powerful under acceleration.
Thomas Davis (verified owner) –
The quality is consistent throughout the system.
Victoria Owens (verified owner) –
The exhaust system is lightweight yet durable.
Ethan Howard (verified owner) –
No rattling or vibration after installation.
Rachel Woods (verified owner) –
Really enhances the overall driving experience.
Dennis Campbell (verified owner) –
No rattling or vibration after installation.
Deborah Russell (verified owner) –
No issues at all since installation.
Olivia West (verified owner) –
The build quality exceeded my expectations.
Jeremy Rivera (verified owner) –
Everything lined up perfectly during install.
Michael Johnson (verified owner) –
The exhaust looks as good as it sounds.
Benjamin Baker (verified owner) –
Great value for such a premium exhaust system.
Samantha Sullivan (verified owner) –
No drone at cruising speeds, just a clean performance tone.
Kyle Bell (verified owner) –
The exhaust gives a true performance feel.
Alan Long (verified owner) –
The fitment is precise and professional.
Victoria Owens (verified owner) –
No drone at cruising speeds, just a clean performance tone.
Charles Rodriguez (verified owner) –
The exhaust looks as good as it sounds.
Lawrence Ramirez (verified owner) –
The sound is exactly what I was looking for.
Paul Taylor (verified owner) –
Very satisfied with this purchase.
Samantha Sullivan (verified owner) –
Adds a bold and sporty character to the car.
Matthew Lopez (verified owner) –
The exhaust looks as good as it sounds.
Nathan Reed (verified owner) –
The system feels premium and well-engineered.
Olivia West (verified owner) –
The exhaust looks clean and well-designed.
Paul Taylor (verified owner) –
The sound is aggressive without being overwhelming.
Alan Long (verified owner) –
The quality of the materials is excellent and feels very durable.
Jeremy Rivera (verified owner) –
Perfect upgrade for any BMW enthusiast.
Cheryl Foster (verified owner) –
The system feels solid and well-built.
Ryan Lewis (verified owner) –
The fitment is precise and professional.
Aaron Edwards (verified owner) –
No issues at all since installation.
Walter Morgan (verified owner) –
Really enhances the overall driving experience.
Ryan Lewis (verified owner) –
The exhaust looks as good as it sounds.
Christopher Martinez (verified owner) –
Great upgrade for both sound and performance.
William Brown (verified owner) –
The exhaust system sounds amazing and gives my BMW a deep, aggressive tone.
Raymond Perez (verified owner) –
The design fits perfectly with the rear bumper.
Joshua Jackson (verified owner) –
The build quality exceeded my expectations.
Deborah Russell (verified owner) –
The system feels premium and well-engineered.
Roger Richardson (verified owner) –
The exhaust looks as good as it sounds.