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Infiniti Q50 / Q60 / Nissan Z (RZ34)
The Spool Performance 4” Fat Boi Resonated Race Downpipes are designed to improve exhaust flow while refining sound quality on the VR30DTT platform.
The oversized 4-inch resonated 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.
Currently in stock and ready to ship.
4-inch resonated 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
-37%
$1,899.00
$2,999.00
-19%
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$1,049.00
-59%
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$849.00
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-59%
$349.00
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