Unleash the true potential of your Infiniti Q50, Q60, or 2023+ Nissan 400Z with the SPDZ1 3" Lower Downpipes, engineered exclusively for the VR30DDTT 3.0L Twin Turbo platform.
Designed to dramatically improve exhaust flow and turbo efficiency, these downpipes transform your car’s performance, response, and sound — all while maintaining perfect fitment and reliability.

Crafted from high-grade polished stainless steel, each SPDZ1 downpipe is precision-bent and TIG-welded to deliver maximum flow with minimal turbulence. The result: faster turbo spool, sharper throttle response, and noticeable horsepower gains across the powerband.

Whether you drive an Infiniti Q50, Q60, or the all-new Nissan 400Z, this bolt-on upgrade brings race-ready performance to your street machine — backed by the proven quality and design of SPDZ1.

Key Features

• Fitment:

  • 2016–2023 Infiniti Q50 3.0T (VR30DDTT)

  • 2017–2023 Infiniti Q60 3.0T (VR30DDTT)

  • 2023+ Nissan 400Z (Z34, VR30DDTT Twin Turbo)

• Material: Premium polished stainless steel for long-term durability and corrosion resistance

• Design: 4-inch high-flow mandrel bends with smooth transitions for maximum exhaust velocity

• Performance: Improves turbo spool, throttle response, and top-end horsepower

• Installation: Direct bolt-on fitment using factory mounting points — includes gaskets and hardware

• Sound: Deep, aggressive exhaust tone with enhanced turbo acoustics

• Recommended: Professional installation and tuning for optimal performance

Performance You Can Feel

From the track to the street, SPDZ1 Downpipes are built for enthusiasts who demand power without compromise. Gain the sharper throttle response, faster spool, and exhilarating tone your VR30 twin turbo was meant to deliver — whether in your Infiniti or your Nissan 400Z.

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