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Exhaust› Exhaust Pipes, Systems and Components
AMS PERFORMANCE
Red Alpha 3-Inch Mandrel-Bent Full Downpipes
SKU: ALP.28.05.0002-1
Moderate — 2–4 hours
Overview
They are compatible with 2017-2022 Infiniti Q60 models with the 3.0L VR30DDTT turbocharged engine, 2016-2024 Infiniti Q50 models with the 3.0L VR30DDTT turbocharged engine, and 2023+ Nissan Z models with the 3.0L VR30DDTT turbocharged engine. Installation on emissions-controlled vehicles within the United States requires a completed AMS Race Waiver form.
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Vehicle Symptoms
- Loss of power at high RPM
- Check engine light on (P0420)
- Exhaust smells like rotten eggs
- Turbo lag or slow spool
- Excessive back pressure or exhaust restriction
Diagnostic Codes
- P0420 – Cat Sys Efficiency Below Threshold (B1)
- P0430 – Cat Sys Efficiency Below Threshold (B2)
Relevant Conversations
- VR30DDTT downpipes P0420 fix
- AMS performance downpipes VR30DDTT review
- Q50 downpipe install time and difficulty
- downpipes vs catback exhaust VR30
- VR30DDTT race downpipes check engine light
- best downpipes for VR30DDTT 400Z
- VR30DDTT downpipes without tune
- AMS downpipes vs fast intentions VR30
- VR30DDTT exhaust upgrade for more power
- downpipe installation tips Infiniti Q50
Product descriptions are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.
Fitment
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Specifications
| Brand | AMS PERFORMANCE |
| Part Number | ALP.28.05.0002-1 |
| Category | Exhaust |
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Returns & Fitment
Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.
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