Spool VR30DTT Full 4 Inch Downpipes Upgrade [Race Downpipes] | Infinit

Spool Performance VR30DTT 4” “Fat Boi” Race Downpipes

Note: We sold out 150 units! Please be patient, we will restock soon, our production team is handling all orders. Please email sales@spoolperformance.us for any questions or concerns.

Infiniti Q50 / Q60 / Nissan Z (RZ34)

The Spool Performance 4” Fat Boi Race Downpipes are designed to improve exhaust flow while refining sound quality on the VR30DTT platform.

The oversized 4-inch section is engineered specifically to smooth exhaust tone, reducing high-frequency harshness and rasp while maintaining a deep, aggressive character under load. This design allows for a more controlled, intentional sound without sacrificing performance.

Constructed from mandrel-bent 304 stainless steel, these downpipes are fully TIG-welded and utilize CNC-machined mounting brackets to ensure precise fitment and long-term durability. Each set includes all necessary hardware and accommodates both 2.5-inch and 3-inch exhaust outlets.

Features

• 4-inch section for improved exhaust tone

• Mandrel-bent tubing for smooth exhaust flow

• Fully TIG-welded 304 stainless steel construction

• CNC-machined brackets for accurate fitment

• Includes all required installation hardware

• Compatible with 2.5” and 3” exhaust systems
  
  
  

Tuning: We recommend Racebox for tuning via EcuTek. EcuTek can be purchased through them.

LEGAL DISCLAIMER: This product is intended solely for closed-course competition or off-road use and is not legal for use on public roads or highways. This product modifies or replaces emissions-related equipment and is not compliant with EPA or CARB emissions requirements. Use of this product on vehicles operated on public roads is prohibited. By purchasing this product, the buyer acknowledges and assumes all responsibility for proper use and legal compliance.