STILLEN Nissan 350Z / Nissan 370Z/ Nissan Z / Infiniti G35 Coupe / Infiniti G37 Coupe / Infiniti Q60 Y-Pipe Exhaust Pipe - 504252

The STILLEN Y-Pipe Exhaust is a performance-focused upgrade designed to improve exhaust flow, enhance sound, and unlock additional horsepower and torque across multiple Nissan and Infiniti VQ-powered platforms. Constructed from mandrel-bent stainless steel, this Y-pipe features 2.5” piping that expands to 3” at the collector, reducing restriction and improving exhaust scavenging.

This Y-pipe delivers a mild, refined exhaust note at idle and cruise, while becoming aggressive under throttle, making it an ideal solution for drivers who want performance and sound without sacrificing cabin comfort. It complements factory exhaust cutouts and pairs perfectly with STILLEN Single Path, stock, or Nismo-style cat-back exhaust systems (where applicable).

Dyno results show gains of up to 7 WHP and 3 lb-ft of torque, with even greater gains when combined with the STILLEN Silver Series Y-Pipe-Back Exhaust System.

Vehicle Fitment

Nissan

• 2003–2008 Nissan 350Z [Z33]
• 2009–2020 Nissan 370Z [Z34]
• 2023–2024 Nissan Z [RZ34] - Manual Transmission ONLY

Infiniti

• 2003–2007 Infiniti G35 Coupe [V35]
• 2008–2013 Infiniti G37 Coupe [V36]
• 2014–2015 Infiniti Q60 [V36] - 3.7L V6 ONLY

Fitment Notes

• DOES NOT FIT NISMO models
• DOES NOT FIT IPL models
• Designed for VQ35 & VQ37 engines
• Compatible with STILLEN Single Path, Stock, or Nismo-Style (non-NISMO) exhaust systems

Features & Benefits

• Up to 7 WHP Gain at the Wheels*
• Up to 3 lb-ft Torque Increase*
• Mild Idle & Cruise Tone / Aggressive Under Throttle
• Enhances sound without excessive cabin drone
• Perfect balance of performance and refinement
• Mandrel Bent Stainless Steel Construction
• 2.5” Piping Expanding to 3” Collector
• Compliments factory exhaust cut-out design
• Designed to integrate with STILLEN and aftermarket Y-pipe-back exhausts

*Results May Vary

Compatibility Notes

• Output flange retains factory configuration and location

• Compatible with:
  - STILLEN Silver Series Y-Pipe-Back Exhaust System (#504251)
  - Other major brand Y-Pipe-Back exhaust systems

• Not compatible with NISMO or IPL exhaust configurations