Looking for in-stock aftermarket parts to modify or upgrade your 2021 GMC Sierra 3500 HD with dpf back? At Tunersports.com we carry a huge selection of the top name brand performance dpf back parts and accessories for your Sierra 3500 HD.
Whether you have a 2021 GMC Sierra 3500 HD in AT4 to SLT trim we have you covered. We have 6 dpf back available to mod your Sierra 3500 HD. All parts have free shipping to the Continental US 48 States.
 IN STOCK - DROPSHIPS 49-44126-BThis DPF-back exhaust system is constructed of 4" mandrel-bent 409 stainless steel tubing for maximum strength and durability. Finishing off this exhaust system are dual 5" diameter black 304 stainless steel intercooled clamp-on exhaust tips. The tips features an aFe POWER logo plate riveted on for ... aFe Large Bore-HD 4in 409SS DPF-Back Exhaust System w/Black Tip 20 GM Diesel Trucks V8-6.6L (td) L5P 2020-2021 GMC Sierra 3500 HD Base 2020-2024 GMC Sierra 3500 HD AT4 / Denali / SLE / SLT $664.13 SALE |
 IN STOCK - LOW 49-44126-PThis DPF-back exhaust system is constructed of 4" mandrel-bent 409 stainless steel tubing for maximum strength and durability. Finishing off this exhaust system are dual 5" diameter polished 304 stainless steel intercooled clamp-on exhaust tips. The tips features an aFe POWER logo plate riveted on f... aFe Large Bore-HD 4in 409SS DPF-Back Exhaust System w/Polished Tips 20 GM Diesel Trucks V8-6.6L 2020-2021 GMC Sierra 3500 HD Base 2020-2024 GMC Sierra 3500 HD AT4 / Denali / SLE / SLT $603.90 SALE |
 IN STOCK S60610409RELIABILITY BACKED FOR A LIFETIME - ARMOR PLUS Series exhaust systems are crafted from corrosion-resistant T409 Stainless Steel - a value-oriented material designed to protect from penetrating rust and will stand up to almost anything you can throw at it.T409 Stainless Steel tubing is easy to clean.... MBRP 20-23 Chevrolet Silverado 2500HD 6.6L Armor Plus T409 SS Single Side Exit 5in DPF Back Exhaust 2020-2021 GMC Sierra 3500 HD Base 2020-2023 GMC Sierra 3500 HD AT4 / Denali / SLE / SLT $497.54 |
 IN STOCK S60610ALTHE BEST BANG FOR YOUR BUCK - ARMOR LITE Series exhaust systems are a value option with the same fitment, performance and sound as the premium products from MBRP. Heavy-gauge Aluminized Steel tubing helps to resist dings and dents caused by debris under your vehicle. This material can be a great cho... MBRP 20-23 Chevrolet Silverado 2500HD 6.6L Armor Lite AL Steel Single Side Exit 5in DPF Back Exhaust 2020-2021 GMC Sierra 3500 HD Base 2020-2023 GMC Sierra 3500 HD AT4 / Denali / SLE / SLT $390.59 |