ISR Performance Shorty Headers
Both the header and the catalytic converter that came stock on your vehicle can be upgraded with the ISR Performance Long Tube headers for VQ. The 304 brushes stainless steel and the heavy strength flanges that make up these long tube headers are used in construction.
These headers feature a stepped primary design and are constructed to keep as much low- and mid-range torque as possible while also allowing for good gains in top-end horsepower. This is accomplished by keeping as much of the primary as possible.
The innovative High Ground Clearance, “HGC” design places the collector in a position to maximize ground clearance without sacrificing performance.
Each header includes two o2 bungs, which are positioned downstream of the collector. This allows you to use the upstream and downstream o2 sensors that came with your vehicle. CELs can be avoided to some extent with the assistance of a flow restrictor installed in the downstream o2 sensor bung.