JBA Exhaust Components

Fits 1967–1970 Ford Mustang with 390-428 FE Engines

Part #: 6655SJS

Overview

The JBA 67-70 Ford Mustang 390-428 FE 1-3/4in-2-1/2in Primary Silver Ctd Tri Y Header is a high-performance exhaust upgrade designed specifically for classic Ford Mustang models equipped with 390 and 428 cubic inch FE engines. Crafted to maximize power output and efficiency, these long tube headers are engineered for enthusiasts seeking to enhance their vehicle’s horsepower, torque, and overall exhaust flow. Made from durable stainless steel, they combine race-proven design with long-lasting corrosion resistance, making them an ideal choice for both street and track applications. Whether you're restoring a vintage Mustang or building a high-performance muscle car, these headers help unlock your engine’s full potential with improved exhaust scavenging and reduced backpressure. Designed for serious performance upgrades, these headers are perfect for enthusiasts aiming to boost their vehicle’s response and high RPM efficiency. The tri-y design promotes optimal exhaust flow, resulting in increased power across the RPM range. The large mandrel-bent primary tubes ensure smooth airflow, while the oversized exhaust ports support maximum throughput. The extra thick 3/8-inch one-piece flanges provide a secure, leak-free seal, and the proprietary JBA Firecone® merged collectors facilitate smooth merging of exhaust gases for enhanced performance and sound quality.

Key Features

Designed with high-quality materials and precision engineering, these headers feature:

• Mandrel-bent stainless steel primary tubes for optimal airflow
• Large oversized exhaust ports for increased volume
• Extra thick 3/8-inch one-piece flanges for durability and sealing
• Proprietary JBA Firecone® merged collectors for smooth exhaust flow
• Tri-y design to improve scavenging and high RPM efficiency
• Silver ceramic coating for heat resistance and corrosion protection
• Compatible with 1967–1970 Ford Mustang with 390-428 FE engines

Construction & Design

These headers are constructed from high-grade stainless steel, available in 409 or 304 series, ensuring durability and resistance to corrosion. The mandrel-bent primary tubes are precisely manufactured to maintain consistent diameter and smooth curves, reducing turbulence and enhancing exhaust flow. The robust one-piece flanges are engineered to withstand high temperatures and provide a secure fit, while the proprietary collectors are designed to merge exhaust gases efficiently, supporting maximum performance.

Driving Feel & Feedback

Installing these headers can significantly improve your vehicle’s exhaust response, providing a more aggressive sound and a noticeable increase in power delivery. The optimized flow characteristics help enhance throttle response and high RPM performance, giving you a more engaging driving experience.

Installation & Fitment

Designed for direct bolt-on installation on 1967–1970 Ford Mustang models with 390-428 FE engines, these headers require standard mechanical skills and tools for proper fitment. Proper installation ensures optimal sealing and performance, and professional installation is recommended for best results.

What’s Included

The package includes the long tube headers with all necessary hardware for installation, ensuring a straightforward upgrade process.