BMW F32/F33/F36 Valved Cat-Back Dual-Tip Exhaust System – Fits Coupe, Convertible & Gran Coupe Models with B48 Engine | Select Quiet or Loud Sound, Premium Performance Upgrade

Unleash your 4 Series’ true character with the BAVMODS® Dual-Tip Valved Cat-Back Exhaust System, engineered for the B48-Powered BMW F32/F33/F36 Coupe, Convertible and Gran Coupe. This system delivers the perfect blend of everyday refinement and weekend aggression — complete with a bold dual-exit layout that instantly transforms your car’s rear profile.

Whether you’re after a deeper tone, improved throttle response, or a sportier stance, this cat-back brings all three together in a precision-built, OEM+ package.

Dual-Mode Valve Control: Quiet or Loud on Demand

Take control of your exhaust note with a valve-actuated system that lets you switch between two distinct sound modes:

• Quiet Mode (Valves Closed): A refined, subtle tone ideal for daily driving or early-morning starts.

• Loud Mode (Valves Open): A sharp, aggressive sound with pronounced turbo spool, deep growl, and exhilarating overrun burbles.

With the push of a button, your F3X transforms from composed cruiser to head-turning performer — all while maintaining OEM-level fitment and drivability.

Designed for Performance Flow & Aesthetic Impact

This system enhances both flow efficiency and visual appeal. The redesigned exhaust path reduces restriction for improved exhaust velocity and throttle response, while the dual-tip rear section gives your 4 Series the sporty look it deserves.

Each tip is positioned for a symmetrical, performance-inspired finish — perfectly aligning with M-style or aftermarket diffusers for an aggressive, track-ready appearance.

The internal muffler layout balances tone and backpressure, ensuring strong midrange torque and smooth acceleration across the RPM range.

Key Features & Benefits

• Dual-Tip Layout – Instantly transforms your rear-end design with an aggressive, performance-driven appearance.
• Dual-Mode Valve Control – Switch between quiet cruising and open-valve aggression at any moment.
• Enhanced Flow Dynamics – Freer exhaust flow for sharper throttle response and improved performance potential.
• Aggressive Yet Controlled Tone – Deep, resonant sound when opened, refined and subtle when closed.
• Plug-and-Play Installation – Direct bolt-on fitment using factory hangers and mounts.
• OEM+ Design Language – Seamless integration with stock or M-style rear diffusers.

Included Components

• Complete valved cat-back exhaust system (mid-pipe + rear section)
• Dual exhaust tips – available in polished, chrome, or black finishes
• Valve control module or remote toggle system
• Mounting hardware, clamps, and gaskets

Performance & Sound You Can Feel

The BAVMODS® Dual-Tip Valved Cat-Back Exhaust System brings out the best of the B48’s turbocharged character.

With valves closed, it hums with a smooth, OEM-like tone. Open them up, and your 3 Series comes alive — delivering a deep, commanding sound that perfectly complements the bold dual-exit design.

Expect:

• Deeper, more refined tone under load
• Improved exhaust flow for enhanced response
• Aggressive rear-end presence with dual tips
• Balanced sound control for both comfort and spirited driving

This is more than just an exhaust — it’s a statement of performance and precision, built for those who demand both form and function.

FITMENT: BMW 4 Series – F32 / F33 / F36 (2017–2020) including F32 Coupe: 430i (B48 2.0L Turbo Engine), F33 Convertible: 430i (B48 2.0L Turbo Engine), F36 Gran Coupe: 430i (B48 2.0L Turbo Engine)

*Compatible with RWD and xDrive configurations

*Designed for dual-tip rear layout for a clean OEM+ appearance

Note: Designed specifically for B48-equipped 430i models (LCI 2017–2020). Not compatible with 428i (N20/N26 engine) or 435i / 440i variants.

IMPORTANT NOTE: All exhaust systems are custom fabricated to order. These are not generic third-party exhausts — our team handles each system in-house, and you’ll be able to see the craftsmanship immediately upon unboxing.

While materials are sourced worldwide, all final metalwork, quality assurance testing, and fitment/mounting verification are completed at our facility in Texas, United States.

Because of the extensive labor involved and the high cost/risk of return shipping exhaust systems, full returns are not accepted. However, if there is ever a verified fitment issue, we will 100% stand by our guarantee and, with proper documentation, make sure you are taken care of.

Please note: once an order is placed, if we are not contacted within 24–48 hours of order placement, cancellations cannot be promised.

Each exhaust unit takes approximately 2–3 weeks for full fabrication. Once fabrication is complete and the system is in quality assurance testing, we will send detailed photos of your exhaust for you to review and approve so you feel fully confident before it ships.

Please refer to the “Fitment” section in the product description for compatibility details.