JBA 2035S Cat4Ward 1-1/2in Primary Raw 409SS Headers for Select 2003-2011 Toyota (4.0L) w/o A.I.R.

Fits select 2003-2011 Toyota 4Runner, FJ Cruiser, Tacoma, and Tundra (4.0L V6) without Air Injection System (A.I.R.).

JBA Cat4Ward shorty headers (MPN: 2035S) are a direct performance upgrade for restrictive factory manifolds. Engineered to increase engine efficiency, these headers produce significant power and torque gains by optimizing exhaust flow. Each set is constructed from mandrel-bent 409 stainless steel to ensure consistent tubing diameter and withstand the thermal stress of heavy towing, off-roading, or daily driving.

These headers feature JBA’s proprietary Firecone collector, a race-proven design that maximizes scavenging for improved throttle response. The 3/8-inch thick machined flanges provide a stable sealing surface to prevent leaks, even under high-heat conditions.

• Material: Raw 409 Stainless Steel
• Primary Tube Diameter: 1-1/2 inch
• Flange Design: 3/8-inch thick machined with oversized ports
• Collector: Proprietary JBA Firecone design
• Fitment: Specific to 4.0L V6 models without Air Injection
• Tubing: Mandrel-bent for unrestricted flow
• Hardware: Includes factory-style emission connections and installation hardware