Description
High-Performance VQ35DE Exhaust Headers for 2003-2007 Infiniti G35 & Nissan 350Z
Upgrade your vehicle with FLASHARK's premium VQ35DE headers to unlock your engine's true potential. Designed specifically for 2003-2006 models equipped with the 3.5L V6 engine, these high-performance G35 exhaust headers are crafted from T304 stainless steel with a mirror-polished finish, offering superior durability, heat resistance, and style.
Featuring a 1.75" primary runner and a 2.1" collector, this direct bolt-on upgrade dramatically improves gas flow. By reducing restrictive backpressure, you'll experience immediate horsepower gains and an aggressive, deep exhaust note. Whether you drive a sedan or a coupe, these are the ultimate G35 headers for your build.
Fitment:
- 2003-2006 Nissan 350Z (3.5L VQ35DE)
- 2003–2006 Infiniti G35 Sedan (3.5L VQ35DE)
- 2003–2006 Infiniti G35 Coupe (3.5L VQ35DE)
Key Features:
- Horsepower Gains: Estimated +10 to +15 WHP (Wheel Horsepower) increase, especially when paired with a catback exhaust and proper ECU tune.
- Torque Boost: Noticeable improvement in mid-range punch and low-end torque for better street drivability.
- Throttle Response: Eliminates factory restriction, allowing the engine to rev much faster and smoother.
- Exhaust Note: Transforms the standard VQ sound into a deep, aggressive, and exotic sports car growl without annoying drone.
Specifications:
- Brand Name: Flashark
- Certificate: ISO9001:2000
- Application: Automobile Exhaust Header
- Material: T304 Stainless Steel
- Surface: Mirror Polish
- Model: EH28975
- Primary Runner: 1.75"
- Collector: 2.1"
- Inlet/Outlet: 1.4*35.56mm / 2.4*60.96mm
🚚 Delivery & Warranty:
Shipping: Free Shipping (Estimated delivery in 3-5 Working Days)
Warranty: 270 days
Package Includes:
- 2 x Exhaust Headers (Left & Right)
- 2 x Engine Block Gaskets
- 2 x 3-Bolt Collector Gaskets
- 1 x Set of Installation Hardware (6 Bolts, 6 Nuts, 6 Washers)
(You will receive exactly what is shown in the picture below)
The Engineering: Why Upgrade to Aftermarket G35/350z Headers?
When modifying your vehicle, comparing aftermarket g35 or 350z headers to a restrictive stock manifold is essential. Factory cast-iron parts force exhaust gases to collide, choking your engine's performance. Here is how FLASHARK solves this:
- The Scavenging Effect: Our precisely tuned primary runners ensure that exhaust pulses do not interfere with each other. This creates a vacuum that literally "pulls" the exhaust gases out of the next cylinder, allowing your V6 to breathe easier.
- Mandrel-Bent Tubing: Unlike cheap crush-bent pipes that restrict flow at the curves, our design gives each engine cylinder its own dedicated, smooth tube, eliminating gas collision.
- Premium Material: Factory manifolds trap heat and rust. Our headers are constructed from high-grade stainless steel for vastly superior thermal efficiency and corrosion resistance.
Installation Notes:
These headers are designed as a direct bolt-on replacement for your factory manifolds. They feature pre-welded O2 sensor bungs for a straightforward swap. However, due to the tight engine bay space in the VQ35DE chassis, we highly recommend having them installed by a professional mechanic.
Pro Tip for Maximum Gains
Often, after purchasing the Exhaust Header for 2003-2007 Nissan 350Z/G35/Z33 V6 3.5L VQ35DE, customers will also purchase other items. Come on, check out Flashark's all-in-one kits and modify your car to your heart's content!
Frequently Asked Questions (FAQs)
Q1: Will these VQ35DE headers fit my 2003-2007 Nissan 350Z and Infiniti G35?
A1: Yes! These exhaust headers are specifically designed as a direct bolt-on fit for 2003-2006 Nissan 350Z, 2003-2006 Infiniti G35 Sedan, and 2003-2007 Infiniti G35 Coupe models equipped with the 3.5L VQ35DE engine.
Q2: Will installing these G35 exhaust headers throw a Check Engine Light (CEL)?
A2: Since these aftermarket G35 headers retain the factory O2 sensor bung locations, they typically do not trigger a CEL on their own. However, if you pair them with catless test pipes, you may need O2 spacers or a custom ECU tune to prevent a light.
Q3: Do I need an ECU tune after installing these 350z headers?
A3: While your VQ35DE engine will run safely without a tune, we highly recommend getting a professional ECU tune. A tune will help you maximize the horsepower and torque gains unlocked by the improved gas flow of your new 350z exhaust headers.
Q4: How much horsepower will I gain with these headers for G35 and 350Z?
A4: Customers typically see an estimated gain of +10 to +15 WHP (Wheel Horsepower). For maximum performance, we recommend pairing these Infiniti headers with a high-flow catback exhaust system and a proper tune.
Q5: Does the package include all the gaskets and hardware needed?
A5: Absolutely! Your purchase includes 2x Engine Block Gaskets, 2x 3-Bolt Collector Gaskets, and a complete set of installation hardware (6 bolts, 6 nuts, 6 washers). You won't need to make extra trips to the auto parts store.
Q6: Are these VQ35DE exhaust headers a direct bolt-on replacement?
A6: Yes, they are designed to directly replace your restrictive factory cast-iron manifolds without major modifications. However, because the VQ35DE engine bay is tight, we highly recommend professional installation by a certified mechanic.
Q7: How will these headers change the sound of my Nissan or Infiniti?
A7: Upgrading to these mandrel-bent 350z de headers will significantly enhance your exhaust note. They transform the standard factory sound into a deeper, more aggressive, and exotic sports car growl without causing annoying highway drone.
Q8: What material are these Infiniti G35 headers made from?
A8: Our headers are constructed from premium T304 Stainless Steel with a mirror-polished finish. This ensures vastly superior heat resistance, durability, and rust protection compared to the factory cast-iron manifolds.
Q9: Can I use these 350z exhaust headers with test pipes or high-flow cats?
A9: Yes! These headers feature a standard 2.1" collector and 3-bolt flange, making them fully compatible with OEM catalytic converters, aftermarket high-flow cats, and most standard test pipes designed for the VQ35DE platform.
Q10: How fast is the shipping, and do you offer a warranty?
A10: We offer Free Shipping with an estimated delivery time of just 3-5 working days. Plus, your purchase is backed by our solid 270-day warranty, so you can buy your new G35 coupe headers with total peace of mind!
Q11: Why should I choose FLASHARK headers over the stock exhaust manifold?
A11: Stock manifolds force exhaust gases to collide, creating backpressure that chokes your engine. Our VQ35DE headers feature precisely tuned 1.75" primary runners to create a "scavenging effect," pulling exhaust gases out efficiently for noticeably better throttle response and power.