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Overview

Founded in 2006, Topteng brand Enhance your driving experience with premium automotive and motorcycle accessories designed specifically for optimal performance and durability. Our parts are engineered to exact OEM standards, ensuring seamless compatibility with major vehicle models. Note: Please check the product details for specific vehicle compatibility if you need the part.

3.5" Downpipe Exhaust For Chevrolet Silverado & GMC Sierra L5P 6.6L Duramax Diesel 2017-2023

Model: C138-B090
Web Code: 19518437
Sold and shipped by | 4.2 seller rating (32 reviews)

Available for deliveryAvailable online only

Delivery times vary by location. Most Marketplace items leave sellers' locations within 2 business days. Allow additional time for shipping.

Seller Return Policy

Read return policy

Warranty

Check with the manufacturer for details.

For Quebec residents: See the Availability Guarantee disclosure in the Specifications section below.

Feature:

The downpipe on your turbocharged vehicle is directing the exhaust gases out of the turbine housing into the exhaust system. An aftermarket downpipe will typically be larger in diameter and either uses a high-flowing catalytic converter or remove the catalytic converter altogether.

By removing the factory downpipe and replacing it with a high flowing unit you are allowing the turbo to more efficiently move gases away from the turbine which creates more power. Since the factory restrictions are now gone you can increase the boost on the vehicle as the factory downpipe is a choking point for performance.

Specifics:

Condition:100% Brand New

Material: Stainless Steel

Type: 3.5 Inch Downpipe

Fitment:

For 2017,2018,2019,2020,2021,2022,2023 Chevrolet Silverado & GMC Sierra 2500 & 3500HD 6.6L Duramax pickup trucks.

Will not fit Cab & Chassis trucks

Package including:

As shown in the figure

NOTE

Not for sale or street use on a licensed vehicle in the State of California and New York & does meet CARB states.

All products we sold are deemed for "Off-Road use only"

For Quebec residents – Disclosure under the Consumer Protection Act

In compliance with Bill 29, Best Buy and third-party sellers on Best Buy Marketplace do not guarantee the availability of replacement parts, repair services, or maintenance information for any products. Coverage provided through any Best Buy Protection programs and applicable manufacturer warranties, if any, remain in place. Please contact the manufacturer directly for information about their availability guarantee.

Shipping Charges

Free standard shipping may be available on orders over a minimum amount (before taxes, fees, and promo codes). Shipping charges may vary based on item size and your shipping address. Want a shipping charge estimate? Simply add an item to your cart, then access the cart and enter your postal code in the shipping estimate section.

Processing Time

Most items ship within 2 business days after an order is placed*. Allow additional time for shipping to your address.
*Please note: If an item you ordered becomes unavailable, you'll be notified and a full refund will be processed within 2 business days.

Shipping Area Restrictions

Shipping is not available in the following areas*:
  • Quebec
  • Yukon
  • Northwest Territories
  • Nunavut
*Please note: Shipping area restrictions may vary for large items. If an item can't be shipped to your address, we'll let you know during the checkout process.
See our return policy to find specific return information for this product and steps on how to return by mail.