Cometic Gasket Exhaust Manifold Set

2014–2018 Infiniti Q50 3.5L VQ35HR / VQ37VHR, 2014–2015 Infiniti Q60 3.5L VQ35HR / VQ37VHR, 2007–2009 Nissan 350Z, 2009–2020 Nissan 370Z VQ Series Engines

Part #: C4921-064

Overview

The Cometic Gasket Exhaust Manifold Set is designed to provide a high-quality, reliable sealing solution for a range of Nissan and Infiniti VQ engine applications. Crafted for enthusiasts seeking improved exhaust flow, durability, and performance, this set is an excellent upgrade for both street and track use. Whether you're restoring a stock engine or building a performance setup, these manifolds help support increased horsepower and torque by ensuring optimal exhaust flow and reducing the risk of leaks.

Constructed with precision and attention to detail, this exhaust manifold set is ideal for those who demand durability and consistent performance from their vehicle's exhaust system. It offers a significant upgrade over factory gaskets, helping to maintain proper sealing under high-temperature conditions and spirited driving scenarios.

Key Features

Designed with performance and longevity in mind, the Cometic Gasket Exhaust Manifold Set offers several key features:

• Manufactured from high-quality, heat-resistant materials to withstand extreme exhaust temperatures and prevent warping or cracking.
• AM compressed thickness of .064 inches ensures a robust seal while maintaining proper clearance and fitment.
• Oval port shape with dimensions of 1.753 x 1.260 inches optimizes exhaust flow and reduces backpressure, contributing to improved engine efficiency.
• Precision-cut port shape and size tailored for specific Nissan and Infiniti VQ engines, ensuring a perfect fit and seal.
• Engineered to withstand the rigors of high-performance driving, including turbocharged and naturally aspirated applications.
• Designed for easy installation with OEM-style fitment, requiring no modifications for most applications.
• Provides a reliable seal that helps prevent exhaust leaks, which can cause performance issues and increased emissions.
• Ideal for rebuilds, repairs, or performance upgrades aiming to maximize engine output and reliability.
• Backed by Cometic's reputation for quality and precision manufacturing, ensuring consistent performance and durability.

Construction & Design

The Cometic Gasket Exhaust Manifold Set is crafted from premium materials designed to endure the demanding conditions of high-performance engines. The gaskets feature a multi-layer construction with a high-temperature resistant core, providing excellent sealing capabilities and resistance to thermal cycling. The oval port shape is carefully engineered to match the factory manifold ports, ensuring a seamless fit and optimal exhaust flow.

The gaskets are precision-cut using advanced manufacturing techniques, including CNC machining, to guarantee exact dimensions and consistent quality. The .064-inch compressed thickness strikes a balance between durability and flexibility, accommodating slight engine movement and thermal expansion without compromising the seal. This design helps prevent leaks, maintain proper exhaust backpressure, and support overall engine performance.

Performance & Sound

While this gasket set primarily focuses on sealing and durability, its high-quality construction contributes to improved exhaust flow and engine efficiency. Proper sealing reduces exhaust leaks that can negatively impact horsepower, torque, and throttle response. Although not explicitly rated for sound enhancement, a well-sealed exhaust system often results in a cleaner, more refined exhaust note with fewer leaks or rattles.

Installation & Fitment

The Cometic Gasket Exhaust Manifold Set is designed as a direct replacement for the factory gaskets on the listed Nissan and Infiniti models. Installation is straightforward for experienced mechanics or enthusiasts familiar with exhaust system work. The gaskets fit precisely onto the factory manifold flanges, ensuring a secure seal without the need for modifications.

No cutting, drilling, or special tuning is required for most applications. It is recommended to follow standard installation procedures, including proper torque specifications, to ensure a reliable seal and long-lasting performance.

• Ensure engine is cool before installation.
• Remove the old gaskets and thoroughly clean the mating surfaces.
• Place the new gasket onto the manifold flange, aligning ports carefully.
• Tighten bolts to the manufacturer’s specified torque in a crisscross pattern to ensure even sealing.

What's Included

• Set of exhaust manifolds gaskets for the specified Nissan/Infiniti VQ engines

Ideal For

• Performance enthusiasts upgrading or replacing exhaust gaskets
• Engine rebuilds or repairs requiring reliable sealing solutions
• Street and track applications demanding durability and consistent performance
• Restoration projects restoring factory sealing integrity

Emissions Note

This exhaust manifold set is designed to meet or exceed OEM specifications for sealing and durability. However, it is recommended to verify local emissions regulations before installation, as aftermarket gaskets may affect compliance in certain jurisdictions. Always follow local laws and regulations regarding emissions and vehicle modifications.