Exhaust› Exhaust Pipes, Systems and Components

Thunderheader

X-SERIES Exhaust System

$1,899.00

SKU: 1074X

In Stock
In Stock
Ships by Aug 5
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30 Days Return
INSTALL DIFFICULTY
DIY PRO SHOP

Moderate — 2–4 hours

Description

The Thunderheader 1074X is an X-SERIES exhaust system engineered to maximize horsepower for big cubic inch engines. This system features a robust 2-inch headpipe, equal length tubes, and a larger collector, specifically designed for Harley-Davidson's Twin Cam engines. The chrome finish is complemented by full coverage heat shields, offering both style and protection. Designed for optimal performance, the 1074X includes 18mm and 12mm O2 sensor ports, accommodating various tuning setups. The package is comprehensive, providing all necessary heat shields, clamps, bracket, and installation hardware for a complete system. For proper installation and function, it is essential to use Screamin' Eagle Flat Gaskets. This exhaust system is compatible with all 1984 – 2016 FLH Touring Models. The X-SERIES is Thunderheader's newest line focused on achieving peak performance for demanding engine builds.

MIA's Description

The Thunderheader 1074X is an X-SERIES exhaust system designed for maximum horsepower. It features a 2-inch headpipe, equal length tubes, and a larger collector, specifically made for Harley-Davidson's Twin Cam engines.

This exhaust includes full coverage heat shields and 18mm and 12mm O2 sensor ports. It comes complete with all necessary heat shields, clamps, bracket, and installation hardware. Proper installation requires the use of Screamin' Eagle Flat Gaskets.

Fitment

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

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Specifications

BrandThunderheader
Part Number1074X
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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