ISR Performance HGC Long Tube Headers 350Z / G35 / 370Z / G37 - IS-SSHD-VQ35

ISR Performance HGC Long Tube Headers are constructed from 304 brushed stainless steel with heavy-duty flanges and a stepped-primary design. ISR states the HGC collector layout is designed to maximize ground clearance while helping retain low- and mid-range torque and support top-end horsepower.

Key Features

• 304 brushed stainless steel construction
• Heavy-duty flanges
• Stepped primary tube design
• High Ground Clearance (HGC) collector placement for improved ground clearance
• Two O2 sensor bungs per header, located downstream of the collector
• Designed to retain use of factory upstream and downstream O2 sensors

Technical Specifications

• Brand: ISR Performance
• Product Line: HGC
• Product Type: Long Tube Headers
• Manufacturer Part Number: IS-SSHD-VQ35
• Material: 304 brushed stainless steel
• Use: Competition / off-road use only

What's in the Box

• 2 stainless steel long tube headers
• 2 two-bolt exhaust gaskets
• 2 head-to-manifold gaskets
• 4 O2 sensor bung plugs
• 4 exhaust nuts
• 4 exhaust bolts

Vehicle Fitment

• Nissan 350Z (Z33)
• Infiniti G35
• Nissan 370Z (Z34)
• Infiniti G37
• ISR states these headers also work with G35X and G37X AWD variations

Fitment Notes

• ISR’s official product naming references VQ35DE / VQ35HR applications
• Confirm exact engine and chassis compatibility before ordering
• Primary O2 sensor harness extensions are required due to the lower sensor location

Installation Notes

• Factory upstream and downstream O2 sensors can be reused
• Primary O2 sensor harnesses must be extended
• For early-model 4-wire VQ35DE 350Z / G35 applications, ISR offers O2 harness extension kit IS-VQ35O2-EXT
• For most 2011+ 370Z / G37 4-wire applications, ISR offers O2 harness extension kit IS-VQ37O2-EXT1
• Inspect your connector type before ordering

Compliance

Legal only for use in competition vehicles which may never be registered, licensed, and/or used on public streets or highways, and for use in other exempted vehicles.

Warranty

ISR Performance states hard parts are covered by a 1-year limited warranty from the original purchase date. Labor and modified products are not covered.