Stainless Works M12HDRCATX 1-7/8" Catted Headers with Performance Connect for Mustang GT

The Stainless Works M12HDRCATX headers are a premium, bolt-on performance exhaust upgrade designed for the 2011–2014 Ford Mustang GT. Featuring 1-7/8" primary tubes and a 3" X-Pipe, these headers are engineered to maximize exhaust flow and deliver a noticeable increase in horsepower and torque over restrictive factory manifolds.

Constructed from 304 stainless steel with precision TIG welding throughout, the M12HDRCATX headers include 3/8" thick flanges for a leak-free, long-lasting seal. The 3" diameter slip-fit collectors with merge spikes promote smooth exhaust scavenging, helping to optimize engine efficiency across the RPM range.

This kit includes 3" diameter catted lead pipes with high-flow catalytic converters, keeping the system emissions-friendly while maintaining maximum performance potential. The system is specifically designed to mate with Stainless Works Performance Connect exhausts, creating a seamless full 3" diameter exhaust system from header flange to tailpipe.

Key Features:

• 1-7/8" primary tube diameter for high-flow performance
• 3" X-Pipe and 3" diameter catted lead pipes included
• High-flow catalytic converters for emissions compliance
• TIG welded 304 stainless steel construction for corrosion resistance and durability
• 3/8" thick header flanges to prevent warping and exhaust leaks
• 3" slip-fit collectors with merge spikes for optimized exhaust scavenging
• Designed to connect with Stainless Works Performance Connect exhaust systems
• Lifetime guarantee — true bolt-on fitment for 2011–2014 Mustang GT

The Stainless Works M12HDRCATX is a complete, high-performance header and catted lead pipe package that delivers a lifetime-guaranteed, full 3" exhaust pathway. It is the ideal foundation for any serious Mustang GT performance build.