SPDZ1 High Ground Clearance Long Tube Headers

Nissan 350Z • 370Z • Infiniti G35 • G37 • Q50 • VQ35DE / VQ35HR / VQ37VHR

Unlock the true potential of your VQ-powered Nissan or Infiniti with the SPDZ1 HGC (High Ground Clearance) Long Tube Headers. Engineered for enthusiasts who demand maximum performance without sacrificing drivability, these headers deliver noticeable horsepower gains, stronger mid-range torque, and an aggressive exhaust note that every VQ owner loves.

Unlike conventional long tube headers, the innovative High Ground Clearance (HGC) collector design tucks the collectors higher into the chassis, dramatically improving ground clearance while maintaining excellent exhaust flow. The stepped primary design helps preserve low and mid-range torque while still supporting impressive top-end power gains.

Manufactured from premium 304 brushed stainless steel with heavy-duty CNC-machined flanges, these headers are built to withstand years of abuse on both street and track.

Features

✔ Premium 304 Brushed Stainless Steel Construction

✔ High Ground Clearance (HGC) Collector Design

✔ Stepped Primary Tubing for Improved Torque & Horsepower

✔ Heavy-Duty CNC Machined Flanges

✔ Precision TIG Welded Construction

✔ Direct Bolt-On to OEM Mid/Y-Pipe

✔ Factory O2 Sensor Locations Supported

✔ Fits Both RWD & Many AWD Applications

✔ Excellent Exhaust Tone with Increased Flow

Performance Benefits

• Increased horsepower throughout the RPM range
• Improved throttle response
• Stronger low and mid-range torque
• Better exhaust scavenging
• Aggressive race-inspired exhaust sound
• Reduced exhaust restriction compared to factory manifolds

Specifications

• Primary Tubing Diameter: 1.80" OD
• Collector Diameter: 2.50" OD
• 3/8" Thick Exhaust Flanges
• 304 Stainless Steel Construction
• Brushed Finish
• Includes Installation Gaskets

What's Included

• (2) Stainless Steel Long Tube Headers
• (4) Exhaust Collector Gaskets
• (4) Cylinder Head Gaskets

Fitment

Nissan

• 2003-2009 350Z
• 2009-2020 370Z

Infiniti

• G35
• G37
• G25
• Q40
• Q50 (3.7L)
• Q60 (3.7L)
• FX35
• M35 / M35h

Compatible with:

• VQ35DE
• VQ35HR
• VQ37VHR

Also compatible with many AWD (X) models.

Installation Notes

• The upstream O2 sensor wiring may require extension due to the relocated sensor position, we offer two types based on the year of your vehicle, look at the 2 options here:

1. 02-04 350z and 03-05 G35 that have the heated O2 sensors with Blue and Green Connectors

2. O2 Extension Harness 2011+ 370Z - G27 & 2014-2015 Q50 - Q60 all Q40 12"

• Professional installation is highly recommended.
• ECU tuning is recommended to maximize performance and prevent check engine lights after installation.

Race Use Disclaimer

These long tube headers are intended for off-road and competition use only. They eliminate the factory catalytic converters and are not legal for use on public roads in emissions-controlled areas. Please verify your local emissions regulations before purchasing.