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Exhaust› Exhaust Pipes, Systems and Components

Stillen

Cat-Back Exhaust System

Name: Cat-Back Exhaust System
Brand: Stillen
SKU: 504456

$1,260.09

SKU: 504456

Free Shipping over $200

$100 Minimum Order

Non-Returnable Item

DIY PRO SHOP

Moderate — 2–4 hours

Overview

Constructed from 100 percent mandrel-bent tubing and T304 polished stainless steel, this system offers durability and a sharp look. The straight-through mufflers are wrapped in Italian Granite Wool for responsible sound levels.

Show original supplier description

The STILLEN Stainless Steel Near Cat-Back Exhaust System is engineered for the 5.6L engine of select Infiniti models. This system is constructed from 100 percent mandrel-bent tubing and features T304 polished stainless steel for the tips, end pipes, and muffler, ensuring long life and a premium appearance. The straight-through mufflers are specifically wrapped in exclusive Italian Granite Wool, providing durability and maintaining responsible sound levels for a more luxurious cabin feel, even during aggressive throttle. It offers a mild sound at idle and while cruising, which becomes more aggressive under throttle. The system aims to provide an aggressive look that matches the improved sound. Compatibility is specific to the 2011-2013 Infiniti M56 and the 2014+ Infiniti Q70 models equipped with the 5.6L engine. The manufacturer offers a limited lifetime warranty on this exhaust system, underscoring its quality and durability.

Product descriptions are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.

Fitment

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Specifications

Brand	Stillen
Part Number	504456
Category	Exhaust

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Returns & Fitment

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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Shipping

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