ISR Performance Shorty Headers - Nissan 350Z Z33 Infiniti G35 VQ35DE

The ISR Performance Shorty Headers are direct-replacement exhaust headers for the factory VQ35DE-powered Nissan 350Z and Infiniti G35. Built from 304 brushed stainless steel with 1 3/4 inch primary tubing and heavy-duty flanges. Replaces the restrictive factory exhaust manifolds while retaining mid-range torque and adding top-end horsepower.

What It Does

The factory VQ35DE exhaust manifolds are cast iron, heavy, and restrictive by design. The ISR Shorty Headers replace them with stainless tubular equivalents that flow significantly better while keeping a short primary length that preserves the VQ35DE's mid-range torque character. Top-end horsepower gains come from the reduced restriction and improved scavenging vs the factory cast manifolds.

O2 sensor bungs are placed in the factory positions, which means you can reuse your factory O2 sensors and won't need a tune to address sensor placement on most builds.

Important: This Is For Factory VQ35DE Engines

These shorty headers are direct replacements for the VQ35DE factory exhaust manifolds. They are NOT for LS-swapped 350Z builds - for LS swap headers, see the ISR HGC LS Swap Headers (IS-SSHD-350LS).

Fitment

• 2003-2008 Nissan 350Z (Z33) with factory VQ35DE engine
• 2003-2007 Infiniti G35 with factory VQ35DE engine

Features

• 304 brushed stainless steel construction
• Heavy-duty flanges
• 1 3/4 inch primary tubing
• Designed to retain mid-range torque while adding top-end power
• O2 sensor bungs in factory positions (reuse factory O2 sensors)
• Direct replacement for VQ35DE factory exhaust manifolds

What's in the Box

• 2x Stainless steel shorty headers (driver and passenger)
• 2x 3-bolt exhaust gaskets
• 2x Head-to-manifold gaskets
• 6x Exhaust nuts
• 6x Exhaust bolts

Product Details

Brand: ISR Performance

Part Number: IS-SSHD-VQ35SRT

Type: Shorty Headers (Pair)

Vehicle Fitment: 2003-2008 Nissan 350Z, 2003-2007 Infiniti G35

Engine: Factory VQ35DE only (NOT for LS swaps - use IS-SSHD-350LS for those)

Material: 304 brushed stainless steel

Primary Diameter: 1 3/4 inch

O2 Sensor Compatibility: Factory O2 sensor placement preserved

Power Character: Retains mid-range torque, adds top-end horsepower

LS Swap Variant: IS-SSHD-350LS (NOT this part - this part is for factory VQ35DE)

Sold: Pair (driver and passenger) with gaskets and hardware

Legality: Off-road and competition use only