Doug's Headers Transmission Crossmember

Doug's Headers Transmission Crossmembers: Built for the LS Swap Generation

When you're dropping a modern GM LS or LT engine into a classic muscle car or truck, the supporting hardware matters just as much as the engine itself. Doug's Headers — a brand with roots stretching back to 1958 — has extended its engineering expertise beyond exhaust into a focused lineup of transmission crossmembers purpose-built for popular LS and LT engine swap applications.

A Legacy Brand Solving a Modern Problem

Doug's Headers began in 1958 as a small muffler shop in East Los Angeles, California, growing into the most respected name in the header industry since the 1960s. The famous "Headers by Doug" decal was consistently found on many of the top cars in various classes during the 1960s and 1970s. That same commitment to fit, function, and quality now carries through to their transmission crossmember lineup — a natural extension for builders already trusting Doug's for exhaust on their swap projects.

Engineered Specifically for LS and LT Swaps

Doug's Headers offers engine swap transmission crossmembers for a variety of classic Chevrolet and GMC applications. They are CAD-CAM designed, welded steel with a durable black powdercoat finish for proper fit, strength, and appearance — and a single part number is designed to fit all popular late-model manual and automatic transmission swaps.

The crossmember lineup covers several iconic classic platforms:

• 1963–1972 GM C-10 Full-Size Trucks (SKC102) — Bolt-on steel construction with black powder coat finish, engineered specifically for LS-swap applications.
• 1964–1967 GM A-Body (Chevelle) (SKC101) — Designed for 4.8L to 6.2L LS engines in classic mid-size GM platforms.
• 1970–1981 GM F-Body (Camaro/Firebird) (SKC104) — Engineered for LS swaps into Chevy and Pontiac F-body platforms.

Designed to Work with the Full Doug's Ecosystem

The crossmembers are designed to clear up to 3-inch exhaust systems with no loss of ground clearance, and are engineered for use with Doug's Headers' full line of LS engine swap products. This means the crossmember integrates directly with Doug's motor mount kits (such as the SK102 and SK102-A series), ensuring everything works in harmony across the chassis.

Doug's LS engine swap products work together to ensure a proper fit for the LS engine into specific applications, and are offered à la carte so builders can purchase each component as their build requires — with the flexibility to build at their own pace.

The crossmembers come complete with necessary hardware and detailed instructions, keeping the installation process straightforward even for complex swap builds.

Why Choose Doug's for Your LS Swap Crossmember

Doug's products are carefully developed on the vehicles they are intended to fit and are subject to rigorous quality checks during the design and manufacturing process. For anyone already running Doug's headers and motor mounts on an LS swap, the transmission crossmember is the logical piece to complete a cohesive, fitment-tested driveline support package from a single trusted source.