Sale

Exhaust› Headers, Manifolds and Components

Stainless Works

Stainless Power 15-17 Mustang GT Headers 1-7/8in Primaries High-Flow Cats

$1,463.00 $1,418.78 Save $44.22

SKU: S00K SM15HCAT

Out of Stock
In Stock
Ships by Aug 2
Free Shipping over $100
Non-Returnable Item
INSTALL DIFFICULTY
DIY PRO SHOP

Moderate — 2–4 hours

Description

Part #: SM15HCAT

2015-18 Mustang GT headers with 1-7/8" primary tubes, 3" diameter catted lead pipes that mate to the factory connection point. Tig welded 304 stainless steel headers with 3/8" thick flanges and 3" diameter slip fit collectors with merge spikes.This system replaces the factory manifolds, and catalytic converters. Stainless Power headers are backed by a 24-Month guarantee on material and workmanship.

2015-20 Mustang GT headers with 1-7/8" primary tubes, 3" diameter catted lead pipes that fit the factory connection point. Tig welded 304 stainless steel with 3/8" thick flanges and 3" diameter slip fit collectors with merge spikes.

MIA's Description

Mustang GT header system designed to maximize the horsepower on 5 liter motor. Our products have a reputation for unmatched quality and performance. Features: Warranty: Stainless Power (Made Overseas & 2-Year Warranty), Primary Size: 1-7/8" for Naturally Aspirated, Connects To: Stock Exhaust (Factory Connect), Add horsepower and torque with this bolt-on upgrade, 304 Stainless construction will last a lifetime, Smooth mandrel bends optimize exhaust flow, Fully TIG welded for strength and beauty, Multiple connection options to match your build.

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

BrandStainless Works
Part NumberS00K SM15HCAT

Videos

How To Install Long Tube Headers On An S550 Mustang (2015-2023)

How To Install Long Tube Headers On An S550 Mustang (2015-2023)

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