BMW 5-Series F90 Downpipes – Catted & Decat Performance Exhaust Upgrades

BMW 5-Series F90 Downpipes – Unlock the Full Potential of Your M5

The BMW 5-Series F90, produced since 2017, represents the pinnacle of executive performance. Featuring the legendary S63 twin-turbo V8 engine in the BMW M5 F90, this platform delivers mind-blowing acceleration and handling straight from the factory. However, the restrictive OEM downpipes limit your engine’s breathing capacity. Upgrading to a performance BMW F90 downpipe is one of the most effective ways to unleash hidden horsepower, reduce turbo lag, and achieve an aggressive exhaust note worthy of a true super-sedan.

Why Upgrade to Performance BMW F90 Downpipes?

The factory downpipes are engineered for emissions compliance and noise control, which restrict exhaust flow and limit the S63’s tuning potential. Installing performance BMW F90 downpipes offers multiple benefits:

• Significant horsepower and torque gains – improved exhaust flow allows the engine to deliver its full potential.
• Faster turbo spool – reduced lag and sharper throttle response for instant acceleration.
• Enhanced exhaust sound – catted downpipes give a refined sporty tone, while decat downpipes produce an aggressive, motorsport-inspired roar.
• Lower exhaust gas temperatures – better thermal efficiency under high load protects engine components.
• Perfect for ECU tuning – essential for Stage 1, Stage 2, and hybrid turbo builds.

Types of BMW 5-Series F90 Downpipes

Our BMW F90 downpipes are available in multiple configurations tailored to your driving goals and build type:

Catted BMW F90 Downpipes

Catted downpipes use a high-flow catalytic converter to improve exhaust flow while remaining emissions-friendly in many regions. Ideal for performance street builds where compliance matters.

Decat BMW F90 Downpipes

Decat downpipes remove the catalytic converter entirely, allowing unrestricted exhaust flow and maximum power. Perfect for dedicated track cars or builds in regions without emissions restrictions.

Material Options: Stainless Steel & Titanium

Material selection affects weight, heat management, and durability:

• Stainless steel downpipes – robust, corrosion-resistant, and ideal for daily drivers and performance builds alike.
• Titanium downpipes – ultra-lightweight with superior thermal properties and a premium motorsport finish.

Engine Compatibility

Our BMW 5-Series F90 downpipes are engineered for maximum performance across multiple configurations:

• BMW M5 F90 Downpipes – optimized for the S63 4.4L twin-turbo V8 engine.
• BMW M5 Competition F90 Downpipes – designed for higher output variants with increased boost levels.
• BMW M550i F90 Downpipes – engineered for the N63 twin-turbo V8 powering the semi-M performance model.

Performance Gains with BMW F90 Downpipes

Replacing your restrictive OEM downpipe with a performance BMW F90 downpipe delivers dramatic improvements:

• +30–50 HP with downpipes alone.
• +70–100 HP when combined with Stage 2 ECU tuning.
• Substantial torque gains throughout the rev range.
• Sharper throttle response and reduced turbo lag.

Choosing the Right Diameter

For the S63 twin-turbo engine, selecting the correct diameter is critical:

• 3-inch downpipes – ideal for Stage 1 and Stage 2 performance upgrades.
• 3.5-inch downpipes – perfect for extreme builds, hybrid turbos, and high-boost applications.

All our BMW F90 downpipes are engineered for direct bolt-on installation with OEM-compatible mounting points.

Build Quality & Engineering

Each BMW F90 performance downpipe is manufactured to motorsport-level standards:

• Mandrel-bent tubing ensures smooth, unrestricted flow.
• High-grade stainless steel or titanium construction for durability.
• Precision TIG welding for superior strength and a leak-free finish.
• OEM-style flanges and fittings for a perfect fit.

Tuning Potential

Pairing your BMW F90 downpipes with ECU tuning unleashes the full performance potential of the S63 engine:

• Massive gains in horsepower and torque.
• Optimized boost control, ignition timing, and fueling strategies.
• Custom exhaust profiles tailored to catted or decat setups.

Daily Driving vs Track Applications

For street-driven builds, catted downpipes deliver balanced performance and emissions compliance. For pure track use, decat downpipes provide maximum exhaust flow, top-end power, and a motorsport-grade sound profile.

Conclusion

Upgrading to performance BMW 5-Series F90 downpipes is one of the most effective ways to transform your M5 or M550i. Whether you opt for catted or decat configurations, our downpipes deliver premium quality, flawless fitment, and proven gains. Unlock the full potential of your BMW F90 today.