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JBA has been building and testing headers for the 5.7L HEMI since it was introduced in 2003. With this experience our engineers were familiar with the design and flow characteristic of the heads and knew what the engine would respond best to. The engineering team at JBA addressed the critical short comings of the 5.7L HEMI exhaust manifolds with a fresh design that started with high flowing 1-3/4" mandrel bent stainless steel tubing. By giving each cylinder a smooth unrestricted path, back pressure is reduced and flow goes way up. The giant 3" collector was engineered using JBA's patented Firecone® - a unique directional device similar to what you find on a long tube race header - which improves flow by providing efficient scavenging of exhaust gasses. Other standard features like thick 3/8" CNC laser-cut flanges, O.E. style JBA sealing dome connection to the exhaust and high quality hardware make them a highly effective upgrade for the HEMI. Order a set today from Gravana Tuning and bolt-on a set and feel the difference - The JBA Difference!
FEATURES:
- 3/8" thick laser-cut single piece flanges
- 1-3/4" stainless steel primaries
- Patented JBA Firecone® merge collector
- JBA sealing dome connection with exhaust
- Premium quality hardware and gaskets
- Direct bolt-on installation
- Will not void factory warranty
- Optional ceramic coating (thermal barrier)
- 50 state smog legal
FEATURES:
- Increase hp & torque throughout RPM range
- Improved throttle response
- Reduced back pressure
- Reduced under hood temperature
- Increased passing power
- Increased low-end torque
- Makes engine more sensitive to other modifications (intake, chip, supercharger, etc.)
- Improved engine compartment appearance
Notes :
For Ceramic Thermal Heat Barrier Coating, select JBA-1964S-1JS (Silver) or 1964S-1JT (Titanium). These headers are port matched for the D-port heads.
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