Stainless Downpipe

This aFe POWER turbo downpipe is engineered to outflow and outperform the restrictive, factory downpipe on the 2011 - 2015 GM Truck with V8-6.6L (td) engine. The mandrel bent, stainless steel tubing offers smoother transition bends for increased airflow, delivering quicker turbo spool times. CNC machined V-band inlets and outlets ensure a factory style, 360-degree sealing surface. Both inside and outside surfaces of the downpipe are ceramic coated to reduce EGT's even in the most extreme environments.

Additional Information

MACH Force-Xp 3 IN 409 Stainless Steel Downpipe GM Diesel Trucks 11-15 V8-6.6L (td) LML

• 100% TIG-Welded
• 3 IN Mandrel Bent Stainless Steel Tubing
• 409 Stainless Steel
• CNC Machined Flanges

Note for Australian and European Markets

Unless otherwise stated, this product may be engineered for use in Left-Hand Drive vehicles. Steering components, pedals, shifters, linkages, wing mirrors, instrument clusters, panhard rods/traction bars, drag links, brake boosters, brake or clutch lines, accelerator cables, heater cores, some master cylinders and adjacent parts can vary between LHD and RHD configurations. In some models compenents such as windscreen wiper arms, motors and linkages could differ in their size and orientation. Items such as floor mats & dash mats may have differences in their structure around the front row (or padding in different locations). In many cases items are identical depending on the design of the vehicle and part, but may have differing mounts, lengths or bolt patterns. Carefully review the product images and details to ensure suitability for your vehicle, or contact StreetFX support if you are unsure. Returns are not accepted for special order products.

Images are supplied by the manufacturer and may be generic. While all efforts are made to provide accurate pictures, there may be differences in the actual product, such as colour, quantity, version, or included components. Please carefully review the description and specifications for details on inclusions or any variations. Some items may be sold individually or in sets, and images may occasionally depict additional products or quantities not included in your purchase. For assistance or clarification, please contact customer support.

Product Details

Product Downloads

#	Document Type	Download
1.	Installation Instructions

Installation guides, warranty details, and other supporting documents are provided by the supplier. In some cases, these files may originate from regions outside your locale, meaning instructions, warranty procedures, and images may not fully align with your specific vehicle or region (e.g., LHD vs. RHD differences, return policies, etc.). If you need clarification, please contact a StreetFX support agent.

Reference Information

Turbo Downpipe, 409 Stainless Steel, Ceramic Coated, Chevy/GMC, 6.6L Each

The aFe Power Mach Force XP turbo downpipes are 100 percent TIG-welded and engineered to perform in the most extreme environments. They use a stepped design that increases exhaust velocity and eliminates low pressure drops—which helps to scavenge the exhaust for increased intake charge and more power. The downpipes are constructed from ceramic coated 3 in. mandrel-bent 409 stainless steel tubing for maximum flow. Smooth transition bends allow for low turbulence, quicker turbo spool times, and lower EGTs. They're designed using a resonance chamber to reduce the in-cab resonance found with other downpipes. All hardware and brackets are included for a hassle-free installation. Order the model recommended for your vehicle.

Additional notes:
• Race proven strength and durability
• Installation: Utilizes the factory mounting locations, providing stability and a direct fit
• Leak-Free Seal: High-quality OE-style CNC-machined flanges are used for a complete 360 degree sealing surface
• Finish: Downpipe is ceramic coated inside and out. Developed by the aerospace industry, this coating is used to lower underhood temperatures by insulating the stainless steel tubing. The satin aluminum finish is chip- and heat-resistant up 1,600 degrees F