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Exhaust Exhaust Pipes, Systems and Components

STILLEN

304 Stainless Steel Mandrel-Bent Mid-Pipe Conversion

$987.14 $791.60 Save $195.54

SKU: 504391

In Stock
In Stock
Ships by Aug 4
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30 Days Return
INSTALL DIFFICULTY
DIY PRO SHOP

Moderate — 2–4 hours

Description

The STILLEN 504391 mid-pipe serves as an axle-back to cat-back conversion, specifically designed for the 2016-2023 Nissan Maxima. It enhances the driving experience with improved sound and performance. Constructed from durable 304 stainless steel and featuring a mandrel-bent design, this component is engineered for optimal exhaust flow. Key features include the integration of a Y-pipe and resonator, contributing to a more aggressive exhaust note and potential performance gains. STILLEN claims this mid-pipe will deliver horsepower and torque gains to the wheels. This mid-pipe is compatible with specific STILLEN Axle-Back Exhaust systems: Part # 504399 for 2016-2018 models and Part # 504403 for 2019+ models. The product description also notes that this is a Race Only product intended for competition use.

MIA's Description

The STILLEN mid-pipe is an axle-back to cat-back conversion for the Nissan Maxima. It is constructed from 304 stainless steel with a mandrel-bent design.

It complements factory exhaust cutouts and aims to provide gains in horsepower and torque.

Fitment

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Specifications

BrandSTILLEN
Part Number504391
CategoryExhaust

Buy with Confidence

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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