2017-2023 GMC Sierra 2500 3500HD 6.6L 3.5" Downpipe Exhaust

$253.75
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Vendor: Topgpart
Availability: In Stock Pre order Out of stock
Description
Specifics:
1. Size: 3.5 inches
2. Condition: 100% Brand New
3. Material: Stainless steel & fiber

Fitment/Compatible with:
For 2017, 2018, 2019, 2020, 2021, 2022, 2023 Chevrolet Silverado & GMC Sierra 2500 & 3500HD 6.6L Duramax pickup trucks.
Note: Not fit Cab & Chassis trucks

Package Includes:
1 x Downpipe
1 x Roll Fiber
2 x hose clamps
(showed as picture)

Features:
1. The up-pipe connects the exhaust manifold to the turbocharger and lets exhaust gases flow in. The down-pipe links the turbocharger to the rest of the exhaust system and allows exhaust gases to flow out.
2. By removing the factory downpipe and replacing it with a high-flow unit, the turbo can more efficiently expel exhaust gases from the turbine, thereby generating greater power. Since the factory downpipe is a performance bottleneck, removing its restriction allows for an increase in the vehicle's boost.

Shipping (UNITED STATES):

Handling Time: within 24 hours
Shipping Time: 3-5 days

Tracking info will be emailed to you once the order has been shipped. Shipping will take 3-5 days.
Our Guarantee

Free 60-day returns and 1-year warranty.

We believe our products can help people's everyday lives, and we fully stand by our products. We offer a risk-free 60-day guarantee on all our products. If you don't have a great experience, we will ensure you are satisfied with your purchase. We also offer a 1-year free breakdown warranty on our products.

Note:
– Make sure to review the details carefully before making your purchase.
– For best results, professional installation or advice is strongly advised if you encounter any issues.
– Please note that due to variations in lighting and screen settings, the actual color may differ slightly from the image.
– Allow for minor size variations due to differences in manual measurements.

Review

Customer Reviews

Based on 13 reviews
85%
(11)
15%
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E
Eric W.

It's made really well, fits great, and sounds just right. Great upgrade for the car!

A
ANGEL A.C.
Perfect fit, fast shipping!

Installed this downpipe on my 370Z - bolted right up with no issues. Noticeable power gain and deeper sound. Shipped crazy fast (3 days!) and customer service was super responsive when I had questions. No CEL after weeks of driving. Highly recommend for 370Z/G37 owners!

PROS:
✔️ OEM-quality fitment
✔️ Improves throttle response
✔️ Arrived in 3 days
✔️ Helpful customer support
✔️ No check engine lights

Great upgrade at this price point!

S
Stephanie Holmes

This downpipe kit is a beast! Fits my '19 F350 like a glove and woke up the turbo sound. Easy install, no leaks—totally worth it.

S
Shawmon l.h.
Amazing Sound & Performance Boost – Perfect for the MR2!

Just installed this catback exhaust system on my 1995 Toyota MR2 Turbo, and I’m absolutely thrilled with the results! The 4.5" dual tips look aggressive and fill out the rear bumper perfectly, giving the car a much more sporty and refined appearance.

R
Roy Calton
Perfect Fit & Great Performance

Just installed this downpipe on my Nissan 350Z Infiniti G35, and it works flawlessly! The quality is top-notch—thick, durable steel with smooth welds. Installation was easy, and it bolted right up to the turbo with no leaks.

Noticed better throttle response and a deeper turbo sound right away. Great upgrade over the restrictive stock pipe. Highly recommend!

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