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The 350Z has VQ35DE and VQ35HR-era exhaust differences, so buy from a listing that explicitly names your model year and confirm its front flanges match the catalytic converters or test pipes already on the car and that its rear flange matches the exhaust. Tier 1 is for standalone Y-pipes. Tier 2 contains complete systems that include or replace the Y-pipe section; they are not drop-in standalone replacements. Exhaust changes can affect emissions legality and sound, so retain compliant catalytic equipment where required and use a qualified installer for leak-free flange alignment.
| # | Product | Price | Where to buy |
|---|---|---|---|
| 1 | Megan Racing LWT-YP-1611 Y-Pipe | $255.60 | Amazon · eBay |
| 2 | Stillen 504252 Y-Pipe | $332.20 | Amazon · eBay |
| 3 | AAM Competition 2.5-to-3-Inch Y-Pipe AAM35E-MFYP253 | $389.99 | Amazon |
| 4 | Circuit Werks Resonated Y-Pipe YP-NS350Z03-RTP | $499.99 | Amazon · eBay |
| 5 | Tomei Expreme Ti Mid Y-Pipe TB6110-NS02A | $749.99 | Amazon · eBay |
| 6 | Motordyne XYZ Resonated Exhaust Y-Pipe MD-019 | $930.51 | Amazon |
| 7 | Z1 Premium Stainless Steel Modular Y-Pipe | $699.99 | Amazon |
| 8 | AAM Competition 350Z 3-Inch Single Exit Exhaust with Y-Pipe | $1,041.04 | Amazon |
| 9 | AAM Competition 350Z 2.5-Inch True Dual Exhaust System | $1,349.99 | Amazon |
The picks, in detail
Megan Racing LWT-YP-1611 Y-Pipe
Tier 1 — a direct bolt-on standalone Y-pipe listed by Megan Racing for 2003–2009 350Z applications. It has dual 2.5-inch inlets and a 3-inch flat-flange outlet, so match both ends to the existing catalytic-converter or test-pipe and cat-back flanges.
- T-304 stainless steel
- dual 2.5-inch inlets
- 3-inch flat-flange outlet
- two flex sections
- manufacturer-published 350Z application
- explicit inlet and outlet dimensions
- listing labels all Megan exhaust products off-road use only
Stillen 504252 Y-Pipe
Tier 1 — a standalone stainless Y-pipe listed for 2003–2009 350Z and designed for a single-path or stock-style exhaust. The retailer specifically excludes AWD and NISMO applications, so do not assume it matches every rear exhaust configuration.
- 2.5-inch piping
- 3-inch collector
- mandrel-bent stainless steel
- current direct-fit 350Z listing
- clear NISMO exclusion
- confirm rear exhaust is single-path or stock-style
AAM Competition 2.5-to-3-Inch Y-Pipe AAM35E-MFYP253
Tier 1 — a standalone AAM Y-pipe for the 350Z/G35, with 2.5-inch-to-3-inch geometry. AAM says its 370Z use requires its own single exhaust; for a 350Z, verify the existing catalyst or test-pipe flange and the rear exhaust flange before ordering.
- 2.5-inch inlets
- 3-inch outlet
- standalone Y-pipe
- manufacturer lists the 350Z
- clear special condition for 370Z use
- not a universal match for every aftermarket cat-back
Circuit Werks Resonated Y-Pipe YP-NS350Z03-RTP
Tier 1 — a two-piece standalone resonated Y-pipe listed for 2003–2009 350Z. Its two 2.5-inch inlets merge to a 3-inch outlet, and the maker describes it as replacing the factory Y-pipe; confirm the catalyst-side and rear-exhaust flange pattern on a modified car.
- two-piece construction
- two flex pipes
- resonator
- 2.5-inch-to-3-inch layout
- explicit 350Z year range
- resonated center section
- higher price than non-resonated steel options
Tomei Expreme Ti Mid Y-Pipe TB6110-NS02A
Tier 1 — a titanium mid Y-pipe with published 350Z applications covering 2003–2004 VQ35DE, 2005–2006 VQ35DE Rev Up, and 2007–2009 VQ35HR. It is a standalone assembly, but its rear connection must suit the selected muffler or cat-back rather than being assumed universal.
- titanium construction
- three-section assembly
- included hardware and gaskets
- engine-era applications are published
- substantial weight-focused alternative
- premium price
- confirm muffler-side compatibility
Motordyne XYZ Resonated Exhaust Y-Pipe MD-019
Tier 1 — a standalone resonated XYZ Y-pipe currently cataloged for Nissan 350Z and other rear-wheel-drive VQ platforms. Because the catalog groups multiple engines and chassis together, confirm the specific 350Z VQ35DE or VQ35HR front-flange and rear-exhaust fitment with Motordyne or the retailer before purchase.
- resonated insert configuration
- modular XYZ pipe design
- current retailer catalog listing
- resonated option
- multi-platform listing requires a fitment confirmation
Z1 Premium Stainless Steel Modular Y-Pipe
Tier 1 — a standalone direct-bolt-on 2003–2008 350Z Y-pipe with 2.5-inch primaries and a 3-inch merge collector. Z1 includes gaskets and hardware and offers resonated or non-resonated rear sections; match it to the installed catalyst or test-pipe and exhaust flange.
- 304 stainless steel
- 2.5-inch-to-3-inch merge
- flex couplers
- resonated or non-resonated rear section
- explicit 2003–2008 350Z fitment
- hardware included
- extra joint can add a potential leak point if installed poorly
AAM Competition 350Z 3-Inch Single Exit Exhaust with Y-Pipe
Tier 2 — a complete 2003-and-newer 350Z single-exit exhaust system that includes a Y-pipe. It replaces more than the Y section, so it is not a standalone substitute for a stock or existing cat-back.
- included Y-pipe
- 3-inch single-exit system
- T-304 stainless steel
- complete matched system
- published 350Z fitment
- not a standalone Y-pipe
- changes the rear exhaust layout
AAM Competition 350Z 2.5-Inch True Dual Exhaust System
Tier 2 — a complete 350Z true-dual cat-back system that AAM says replaces the factory Y-pipe, mid-pipe, and rear muffler section. It is a system-level alternative, not a single replacement pipe, and it bolts to factory cat pipes or many aftermarket 2.5-inch test pipes.
- replaces Y-pipe, mid-pipe, and rear section
- dual 2.5-inch T-304 tubing
- tip options
- matched complete system
- explicit catalyst/test-pipe connection guidance
- not a standalone Y-pipe
- much higher total cost
Buying tips
- Identify the engine and model year first: do not use a listing’s shared 350Z/G35/370Z title as proof that every flange, catalyst, or exhaust connection is identical.
- Compare the front inlet diameter and bolt pattern to the catalytic converters or test pipes already fitted, then compare the rear outlet diameter and flange to the cat-back.
- Use new gaskets and hardware where supplied, support the exhaust without preload before tightening, and have leaks or emissions compliance checked after installation.
As an Amazon Associate and eBay Partner, toptenpick.com earns from qualifying purchases. Prices and availability are subject to change.