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ISR Performance Long Tube Headers (LTH) + o2 extension package
ISR LTH,ISR,ISR long tube headers,370z,g37,350z,g35

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Price $825.00
Sale Price $779.99

Stock Status:In stock

o2 extensions*:
Type 1
Type 2
Type 3
Type 4


ISR Performance HGC Long Tube Headers - VQ35DE/HR/VHR

Nissan 350Z/Infiniti G35/Nissan 370Z/Infiniti G37

This package deal includes a set of ISR long tube headers (LTH) with a pair of our plug and play o2 extensions.You will NOT find a better deal anywhere else!!!

The ISR long tube headers are constructed with 304 brushed stainless steel and heavy duty flanges. Designed with a stepped primary, these headers are built to retain as much low and mid range torque as possible while allowing for good top end horsepower gains as well.

The innovative High Ground Clearance, "HGC" design places the collector in a position to maximize ground clearance without sacrificing performance.

Each header features 2 o2 bungs placed downstream of the collector so that you can utilize your factory upstream and downstream o2 sensors. Our plug and play extensions for the upstream o2 sensors make this process seamless!!!

Which "Type" of o2 extension do you need?
To verify which type of extension your car needs, Simply pop your hood and look at the connector on your upstream o2 sensor. It will be located near the firewall area, and can be seen from either driver or passenger side of the car. If you are still unsure of which type you need, Please contact us prior to placing an order and we will be glad to further assist you.


  • Stainless Steel Long Tube Headers (2)
  • 2 bolt exhaust gaskets (2)
  • Head to manifold gaskets (2)
  • o2 sensor bung plugs (4)
  • Exhaust Nuts (4)
  • Exhaust Bolts (4)
  • NISformance o2 extensions (2)

o2 extension Types:
Type 1- rectangle with side tabs near the bottom
Type 2- square with left side tab near bottom right side tab near top
Type 3- square with side tabs near bottom
Type 4- square with side tabs near top
  • HR 350z
  • HR G35
  • 370z
  • G37
  • Q50 (VHR)
  • Q60 (VHR)
Please note - o2 extensions are NOT returnable, nor exchangeable. Please check the connector type on your own o2 sensor prior to placing an order. If you need help choosing the correct type, please contact us through FB,IG, or email Info@NISformance.com.

*Free shipping to the lower 48 states only* If you are outside of the lower 48 or need international shipping please contact us for a quote.


Average Rating: Average Rating: 5 of 5 5 of 5 Total Reviews: 3 Write a review »

  0 of 0 people found the following review helpful:
5 of 5 Good May 24, 2022
Reviewer: Dylan from , FL United States  
Fit my M37

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  0 of 0 people found the following review helpful:
5 of 5 ISR HEADERS February 2, 2022
Reviewer: Crystal Haverstick from United States  
Hubby absolutely thrilled,can’t wait to put these on G37 coupe… Sheesh times ahead 😁🏎

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  0 of 0 people found the following review helpful:
5 of 5 Excellent experience January 11, 2022
Reviewer: Nicholas Hill from Orlando, FL United States  
Shipping was fast and my order was _very well_ packaged. Nisformance was responsive on Facebook chat and promptly answered any questions I had.

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