Sale

Exhaust› Mufflers and Resonators

FLOWMASTER

80 Series Cross Flow Muffler

$215.83 $180.95 Save $34.88

SKU: 700042010363

In Stock
In Stock
Ships by Jul 29
Free Shipping
30 Days Return
INSTALL DIFFICULTY
DIY PRO SHOP

Moderate — 2–4 hours

Description

The Flowmaster 42583 is an 80 Series Cross Flow muffler designed for classic muscle cars. It features a two-chamber design to enhance performance and minimize back pressure, providing an aggressive exterior sound with moderate interior resonance. Constructed from durable steel with an aluminized gray finish, this muffler is built for longevity and comes with a 3-year limited 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

BrandFLOWMASTER
Part Number700042010363
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.

View Full Return Policy