ISR Performance Shorty Headers -Nissan 370z VQ37HR / Infiniti G37

Built for the VQ37HR in the Nissan 370Z and Infiniti G37, the ISR Performance shorty headers swap the cast iron factory manifolds for tubular 304 brushed stainless steel with heavy duty flanges. ISR chose 1-3/4 inch primaries on purpose: large enough to let the engine breathe up top, small enough to hold on to the mid-range torque that makes the 3.7 liter VQ feel strong on the street.

Built around the VQ37HR engine bay

Later VQ37 engines carry an OEM coolant tube and oil cooler line down the USDM driver side of the block, and plenty of aftermarket headers fight it. These headers are routed to clear that line without modification. Each header also has an O2 bung placed so the factory oxygen sensors go back in exactly where the ECU expects them, with no extenders required.

Specifications

• Material: 304 brushed stainless steel
• Primary tube size: 1-3/4 inch
• Heavy duty head and collector flanges
• Factory O2 sensor provisions on each side

Applications

• Nissan 370Z Z34 with VQ37HR
• Infiniti G37 with VQ37HR

Included hardware

• 2x stainless shorty headers
• 2x 3 bolt exhaust gaskets
• 2x head to manifold gaskets
• 6x exhaust nuts and 6x exhaust bolts

Suggested pairing

For a complete flow upgrade on the HR, combine these headers with the ISR Performance VQ37 high flow catalytic converters, which share the same flange style and bolt directly to the collectors.

All ISR Performance products are designed for off-road use only.