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Roll over image to zoom in Click on image to zoom
Polished stainless 3.5-inch turbo downpipe for 2017-2023 Chevy GMC Silverado Sierra L5P Duramax 6.6L diesel, with a studded flange, V-band clamp, band clamps, and exhaust wrapBrushed stainless 3.5-inch diesel turbo downpipe with a studded flange and V-band connection, accompanied by exhaust heat wrap and two band clampsFlashark 3.5" Turbo Downpipe for 2017–2025 Chevy Silverado & GMC Sierra 2500HD/3500HD 6.6L L5P DuramaxCatless turbo downpipe for 2017-2023 Chevy GMC Silverado Sierra L5P Duramax 6.6L diesel, intended for off-road, track, and exhibition useCatless downpipe with a fully open polished bore for unrestricted flow, faster turbo spool, and an aggressive deep exhaust noteStainless steel 3.5-inch turbo downpipe with CNC mandrel bends and CNC-machined studded flangesStainless turbo downpipe with one pipe, two band clamps, and one roll of exhaust heat wrapPolished stainless 3.5-inch turbo downpipe with a four-bolt flange, a V-band outlet, and a sweeping mandrel-bent bodyStainless diesel downpipe with a studded turbo-outlet flange and a double mandrel bend leading to a V-band connectionV-band flange of a stainless turbo downpipe with rainbow TIG weld beads around the welded jointStudded four-bolt turbo-outlet flange of a stainless downpipe with TIG weld beads around the pipe jointRoll of woven exhaust heat wrap supplied with the turbo downpipe kitPair of stainless steel band clamps included with the turbo downpipePolished turbo downpipe for the L5P Duramax with a four-bolt studded turbo flange, V-band exhaust connection, exhaust wrap, and band clampsTurbo downpipe bundle with a 3.5-inch downpipe, exhaust wrap, band clamps, four gaskets, and two flex-jointed stainless pipesTurbo downpipe delete bundle with a 3.5-inch downpipe, flex-jointed pipes, gaskets, band clamps, exhaust wrap, and accompanying black lines and fittingsStainless turbo downpipe set for 2017-2023 Chevrolet Silverado 3500HD Duramax, with a 3.5-inch downpipe, two flex-jointed pipes, gaskets, band clamps, and exhaust wrapCatless turbo downpipe and two flex-jointed exhaust pipes with gaskets, band clamps, and exhaust wrap for a Chevy Silverado Duramax dieselEmissions delete kit with a stainless turbo downpipe, black hoses, brackets, plugs, clamps, and gaskets for a Chevy Silverado Duramax dieselStainless turbo downpipe paired with a long flex-jointed mid-pipe, band clamps, and exhaust wrap for a Chevy Silverado Duramax dieselBlack-coated 3.5-inch turbo downpipe with a studded flange, V-band outlet, two band clamps, and exhaust wrap

Flashark 3.5" Turbo Downpipe for 2017–2025 Chevy Silverado & GMC Sierra 2500HD/3500HD 6.6L L5P Duramax

SKU: FLES08074
🔥PRIME DAY SALE

🔥PRIME DAY SALE

$219.00Limited Time Deal
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SKU: FLES08074
Style: Silver

⚠ Please verify full vehicle fitment before placing your order.

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Flashark 3.5

Flashark 3.5" Turbo Downpipe for 2017–2025 Chevy Silverado & GMC Sierra 2500HD/3500HD 6.6L L5P Duramax

1 Item · Silver · SKU: FLES08074

$219.00

Total: 5 Items $219.00

Product Specifications

Flashark 3.5" Turbo Downpipe for 6.6L L5P Duramax

Upgrade the turbo-outlet section of your 2017–2025 Chevrolet Silverado or GMC Sierra 2500HD/3500HD pickup with the Flashark 3.5-inch turbo downpipe.

Designed specifically for pickup models equipped with the 6.6L V8 L5P Duramax turbo-diesel engine, this downpipe uses larger 3.5-inch tubing and smooth bends to support more efficient exhaust flow through the turbo-outlet section.

Its durable welded construction is designed for the high-temperature environment around the turbocharger. An exhaust heat wrap is included to help manage radiant heat in the engine bay.

Important: This product replaces the turbo downpipe section only. It is not a complete DPF, EGR or DEF delete kit, and those components are not included.

Key Features

  • Designed for 2017–2025 6.6L L5P Duramax pickup applications
  • 3.5-inch tubing designed to support smoother exhaust flow
  • Four-bolt turbo flange with pre-installed studs
  • V-band connection at the exhaust-system end
  • Durable welded construction
  • Heat wrap included for under-hood heat management
  • Available in polished silver or black finish

Connection Details

  • Turbo Side: Four-bolt flange with pre-installed studs
  • Exhaust Side: V-band connection
  • Pipe Diameter: 3.5 inches

Compare the flange shape, V-band connection, mounting position and overall pipe routing with your original downpipe before installation.

Package Contents

  • 1 × 3.5-inch turbo downpipe in the selected finish
  • 1 × exhaust heat wrap
  • 2 × stainless-steel heat-wrap retaining clamps/ties

Only the parts shown in the selected variant’s package image are included. Factory hardware may need to be reused unless replacement hardware is specifically shown.

Installation

Professional installation is recommended. Allow the exhaust system to cool completely before removal. Before installation, verify the turbo flange, V-band connection, mounting points and pipe routing.

Installation requirements may vary depending on vehicle condition and any previous exhaust modifications. Do not begin installation if the new downpipe does not match the original connection points.

Performance Expectations

The larger tubing and smooth bends are designed to reduce restriction in the turbo-outlet section and support smoother exhaust flow. Actual changes in sound, throttle response and performance depend on the vehicle condition, calibration and the rest of the exhaust system.

No fixed horsepower, torque or fuel-economy increase is guaranteed.

Shipping, Returns & Warranty

  • Orders are normally dispatched within 1–2 business days.
  • Unused and uninstalled products may be returned within 30 days in their original packaging, subject to the Flashark return policy.
  • Return-shipping coverage applies to confirmed product-quality or fulfillment issues.
  • Covered by a 12-month limited warranty against eligible manufacturing defects.