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STILLEN

Cat Back Exhaust System 304 Stainless Steel

$1,481.32 $1,194.44 Save $286.88

SKU: 504392

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 Cat Back Exhaust System (MPN 504392) is engineered for the 2019-2023 Nissan Maxima 3.5L, aiming to enhance both the sound and performance of your vehicle. Constructed from durable 304 stainless steel, this cat-back system features polished mufflers for a refined aesthetic. It delivers a nuanced sound profile, remaining mild during idle and cruising but developing an aggressive note when you accelerate. One reviewer noted that their muffler shop had to perform alterations to avoid clashes with underbody components, and another experienced significant difficulty aligning the rear exits with the OEM diffusers, requiring rework. These comments suggest that installation may be more involved than a simple driveway or garage job in some instances and may require professional adjustment.

MIA's Description

The STILLEN Cat Back Exhaust System is a performance exhaust designed for the 2019-2023 Nissan Maxima 3.5L. It is constructed from 304 stainless steel and features polished mufflers. This system provides a mild sound at idle and cruising speeds, becoming more aggressive under throttle.

The exhaust system is made in America and comes with a Limited Lifetime Warranty.

Fitment

Fitment Guaranteed

Don’t gamble
on fit.

Log your build in the MOTORMIA app and we’ll guarantee this part fits your exact setup — or your money back, return shipping covered.

Available on iOS & Android

Specifications

BrandSTILLEN
Part Number504392
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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