3.5'' Downpipe Exhaust For 2017-2023 Chevy/GMC Silverado/ Sierra L5P Duramax Diesel 6.6L

Flashark 3.5'' Downpipe Exhaust For 2017-2023 Chevy/GMC Silverado/ Sierra L5P Duramax Diesel 6.6L

Unlock the full potential of your L5P Duramax 6.6L engine with the Flashark 3.5" Downpipe Exhaust. Designed specifically for the 2017-2023 Chevy and GMC models, this high-flow downpipe improves exhaust flow, reduces turbo lag, and increases horsepower. Made from durable stainless steel with a mirror-polished finish, it optimizes turbocharger efficiency and boosts engine performance. Perfect for those looking to enhance their L5P Duramax 6.6L's power, responsiveness, and overall driving experience. Whether you're towing or racing, this downpipe is the ideal upgrade for your engine.

Fitment:

• 2017-2023 Chevrolet Silverado 2500 & 3500HD - L5P Duramax Diesel 6.6L Pickup Trucks
• 2017-2023 GMC Sierra 2500 & 3500HD - L5P Duramax Diesel 6.6L Pickup Trucks

Note: Will not fit Cab & Chassis trucks.

Specifications:

Brand Name: Flashark
Application:  Downpipe Exhaust
Material: Stainless Steel
Surface: Mirror Polish

Features:

3.5" Stainless Steel Piping
20% better flow than the factory pipe
Heat wrap included keeping engine bay temperatures down
Greater heat-retention
Will not affect emissions systems
Maximum flow for competition applications
4-bolt flange, two studs installed

What Does the Downpipe Do for Your L5P Duramax 6.6L Engine?

The downpipe is a critical part of your Duramax 6.6L diesel engine, responsible for channeling exhaust gases from the turbocharger turbine housing into the exhaust system. When upgraded, the downpipe typically features a larger diameter than the factory version, which allows for improved exhaust flow. Some high-performance versions also replace or eliminate the catalytic converter for even better efficiency.

By swapping out the factory downpipe for a high-flow option, you allow your engine to expel exhaust gases more efficiently, reducing turbo lag and increasing horsepower. The stock downpipe can act as a bottleneck, restricting exhaust flow and limiting engine performance. An upgraded L5P downpipe removes this restriction, enabling quicker turbo spool, higher boost levels, and ultimately unlocking more power from your Duramax diesel engine.

Why Choose the Flashark Downpipe?

If you’re looking for a complete, high-performance downpipe for your L5P Duramax 6.6L, the Flashark 3.5" Downpipe is the clear choice. Designed specifically for 2017-2023 Chevy and GMC Silverado and Sierra 2500/3500HD trucks, this kit improves exhaust flow, reduces turbo lag, and increases horsepower—without any extra modifications or tuning.

Whether you call it the Flashark Downpipe, the 3.5" high-flow exhaust, or simply a reliable Duramax performance upgrade, this all-in-one kit is engineered for maximum turbo efficiency, easy installation, and lasting durability, while maintaining compatibility with your emissions system.

What is the L5P Duramax 6.6L Engine?

The L5P Duramax is a turbocharged diesel engine introduced by GM for their 2017-2023 Chevy and GMC trucks. Known for its impressive power output of up to 445 horsepower and 910 lb-ft of torque, the L5P engine is a significant upgrade over its predecessors. With improved fuel efficiency, enhanced emissions control, and a more robust design, the L5P provides optimal performance for both everyday driving and heavy-duty applications. The engine also features advanced turbocharging technology that benefits greatly from high-flow aftermarket components, such as the Flashark Downpipe.

FAQ

Q1: What is the Flashark 3.5" Downpipe for L5P Duramax 6.6L engines?

The Flashark 3.5" Downpipe is a high-performance exhaust component for 2017-2023 Chevy Silverado and GMC Sierra 2500/3500HD trucks with the L5P Duramax 6.6L diesel engine. It improves exhaust flow, reduces turbo lag, and increases horsepower and torque.

Q2: Will this downpipe increase my L5P Duramax's horsepower?

Yes. By replacing the factory downpipe with a high-flow 3.5" design, the Flashark Downpipe reduces exhaust restrictions, allowing your turbo to spool faster and deliver more horsepower and torque.

Q3: Is the Flashark Downpipe street legal?

This downpipe is designed to maintain compliance with emissions systems on L5P Duramax trucks. It provides maximum performance without negatively affecting factory emissions controls, making it suitable for street use.

Q4: What material is the Flashark L5P downpipe made from?

The downpipe is made from high-quality stainless steel with a mirror-polished finish. Its durable construction ensures long-lasting performance and corrosion resistance, even under extreme temperatures.

Q5: Will this downpipe fit all Chevy and GMC trucks?

No. This downpipe fits 2017-2023 Chevrolet Silverado 2500/3500HD and GMC Sierra 2500/3500HD trucks with the L5P Duramax 6.6L diesel engine. It does **not** fit Cab & Chassis models.

Q6: How does upgrading the downpipe affect turbo performance?

Upgrading to a high-flow downpipe reduces backpressure and allows exhaust gases to exit more efficiently, helping the turbo spool faster. This reduces turbo lag and improves overall throttle response and boost delivery.

Q7: Does installation require modifications to the emissions system?

No. The Flashark 3.5" downpipe is designed to work with factory emissions systems on L5P Duramax trucks. No modifications are required, ensuring easy installation and continued compliance.

Q8: What are the main benefits of a high-flow downpipe for L5P Duramax engines?

A high-flow downpipe improves exhaust flow, reduces turbo lag, increases horsepower and torque, enhances turbo efficiency, and helps maintain lower engine bay temperatures with the included heat wrap. It’s ideal for towing, racing, or daily driving performance improvements.

Q9: Does the Flashark downpipe come with heat protection?

Yes. It comes with heat wrap included, which helps reduce engine bay temperatures and protects su

Q10: How long does it take to receive the Flashark L5P downpipe?

Shipping typically takes 3-5 business days, allowing you to quickly upgrade your L5P Duramax 6.6L diesel and start experiencing improved performance and faster turbo response.