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ISR Performance

ISR Performance 2014+ Infiniti Q50 ST Series Exhaust

$825.00 $783.75 Save $41.25

SKU: I00Z IS-ST-Q50

In Stock
In Stock
Ships by Oct 20
Free Shipping over $200
$100 Minimum Order
Non-Returnable Item
INSTALL DIFFICULTY
DIY PRO SHOP

Moderate — 2–4 hours

Overview

The ISR Performance ST Series Dual Exhaust is a Y-pipe back exhaust system designed for the 2014+ Infiniti Q50. It features a stainless steel 2-bolt, 3-inch flange that splits into two 2.5-inch pipes with bottle-style resonators. The system continues to an aggressive muffler section with 4-inch tips, providing a deep tone and improved aesthetics.
Show original supplier description

Part #: IS-ST-Q50

Vehicle Symptoms
  • Exhaust sounds too quiet or stock
  • Noticed exhaust drone at highway speeds
  • Exhaust pipes rusted or damaged
  • Want deeper, more aggressive exhaust note
  • Stock exhaust feels restrictive
Relevant Conversations
  • ISR ST exhaust Q50 sound clip
  • Q50 cat-back exhaust install difficulty
  • ISR Performance vs AWE Q50 exhaust
  • Q50 exhaust drone fix aftermarket
  • Best exhaust for Infiniti Q50 3.0TT
  • Q50 dual exhaust system recommendations
  • ISR ST series Q50 review forum
  • Q50 exhaust upgrade without tune
  • 2014 Q50 exhaust system replacement
  • ISR ST Q50 AWD fitment

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

BrandISR Performance
Part NumberI00Z IS-ST-Q50

Videos

Q50 gets ISR headers and a tune. Loud exhaust.

Q50 gets ISR headers and a tune. Loud exhaust.
MY Q50 GETS AN ISR SINGLE EXIT EXHAUST!!! *LOUD*

MY Q50 GETS AN ISR SINGLE EXIT EXHAUST!!! *LOUD*
Q50 ISR headers and full tomei exhaust and Y-pipe. #tomei #q50 #infiniti

Q50 ISR headers and full tomei exhaust and Y-pipe. #tomei #q50 #infiniti
Q50 3.7 ISR headers with tomei set up #infiniti

Q50 3.7 ISR headers with tomei set up #infiniti
Q50 3.7 aggressive downshift ISR header and tomei exhaust

Q50 3.7 aggressive downshift ISR header and tomei 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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Shipping

Orders are processed in 1–3 business days. In stock parts ship promptly from our partner network. Special-order items either aren’t currently stocked or are built to your spec — expect 4–6 weeks. If a part goes on backorder while your order is in the queue, we’ll reach out and work through discounted alternatives together.

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