Kooks Headers Longtube Headers & OEM Catted Y-Pipe Kit

2009–2023 RAM 1500 / RAM 1500 Classic 5.7L VVT HEMI

Part #: 3510H621

Overview

The Kooks Headers Longtube Headers and OEM Catted Y-Pipe Kit is a precision-engineered exhaust upgrade tailored for Dodge RAM 1500 and RAM 1500 Classic trucks equipped with the 5.7L VVT HEMI engine from 2009 through 2023. This premium kit enhances exhaust flow and throttle response, delivering a noticeable improvement in engine efficiency and power potential. Crafted by Kooks, a family-owned company with over 50 years of experience in high-performance exhaust manufacturing, this kit balances aggressive performance gains with emissions compliance.

Whether you use your RAM for daily driving, towing, or spirited performance, this header and Y-pipe combination offers a durable, high-quality solution that improves engine breathing and produces a deeper, more aggressive exhaust tone without compromising reliability or drivability.

Key Features

Designed for enthusiasts seeking a robust and emissions-compliant upgrade, this kit includes:

• Precision-crafted 2" to 3" stainless steel long tube headers for optimized exhaust scavenging and flow
• 3" stainless steel OEM-style catted Y-pipe featuring Kooks GREEN Cats for superior emissions compliance and durability
• Handmade in the USA by a family-owned company with over three generations of exhaust expertise
• Supports modern muscle applications up to 750 RWHP
• Direct bolt-on fitment for 2009–2010 RAM 1500 and 2011–2018 RAM 1500 models
• Compatible with 2019–2023 RAM 1500 Classic trims including Big Horn, Express, Lone Star, SLT, Special Service, Tradesman, and Warlock
• Durable stainless steel construction resists corrosion and heat damage
• Improves throttle response and potential horsepower gains through enhanced exhaust flow

Construction & Design

Kooks Headers are meticulously handcrafted from premium stainless steel, ensuring exceptional strength, corrosion resistance, and long-lasting durability. The long tube header design maximizes exhaust gas velocity and minimizes backpressure, which helps improve engine efficiency and power output. The included catted Y-pipe incorporates Kooks’ proprietary GREEN Cats, engineered to maintain EPA emissions compliance while offering enhanced durability compared to standard catalytic converters.

Every weld and bend is carefully executed to optimize fitment and flow characteristics, ensuring a seamless integration with your RAM’s factory exhaust system for reliable, high-performance operation.

Performance & Sound

This header and Y-pipe kit significantly enhances exhaust flow, resulting in improved throttle response and supporting increased horsepower potential when combined with other performance modifications. The long tube headers contribute to a deeper, more aggressive exhaust tone that enriches the driving experience without excessive drone. The high-quality catalytic converters maintain emissions control while allowing a freer-flowing exhaust path.

Installation & Fitment

The Kooks Headers Longtube Headers and OEM Catted Y-Pipe Kit is designed for direct bolt-on installation with no major modifications required. It fits Dodge RAM 1500 and RAM 1500 Classic models equipped with the 5.7L HEMI engine from 2009 through 2023. Installation typically requires standard hand tools and moderate mechanical experience. Professional installation is recommended to ensure proper fitment and optimal performance.

What's Included

• 2" x 3" stainless steel long tube headers
• 3" stainless steel OEM-style catted Y-pipe with Kooks GREEN Cats
• All necessary hardware and gaskets for installation

Ideal For

This kit is ideal for RAM 1500 and RAM 1500 Classic owners who want to upgrade their exhaust system for improved performance, sound, and durability. It suits street drivers, weekend enthusiasts, and those who occasionally tow or haul, providing a reliable and emissions-compliant solution that enhances the capabilities of the 5.7L HEMI engine.

Emissions Note

Kooks has replaced standard catalytic converters with their EPA-verified GREEN Cats, which offer improved durability and emissions compliance. These catalytic converters meet EPA standards and are suitable for modern muscle vehicles up to 750 RWHP. Customers should verify local regulations before installation to ensure compliance with emissions laws in their area.