-9%

Kooks 2007+ Jeep Wrangler JK w/LS Engine Swap 3in GREEN Cat SS Y Pipe Kooks HDR Req - 37103300

Click to zoom in

Load image into Gallery viewer, Kooks 2007+ Jeep Wrangler JK w/LS Engine Swap 3in GREEN Cat SS Y Pipe Kooks HDR Req - 37103300

Competitive Pricing

We will beat most prices!
Questions?

Contact us at sales@allianceracing.com
Free Shipping

Free shipping on orders over $300!

Kooks 2007+ Jeep Wrangler JK w/LS Engine Swap 3in GREEN Cat SS Y Pipe Kooks HDR Req - 37103300

Brand: Kooks Headers

SKU: ksh37103300

availability: Special Order / Dropship Backorder

$2,450.83 $2,205.75

2007-2018 Jeep Wrangler JK 4-Door w/LS Engine Swap. 3" Stainless Steel GREEN Catted Y-Pipe. 304 Stainless Steel Construction 3" Mandrel Bent 16 ga TubingKooks GREEN Cats 300 Cell High Flow Catalytic Converters Torca Swivel Seal style Connection on InletMust be used with Kooks Headers Part# 37102200 or 37102400 Designed to connect to Kooks Cat-Back Exhaust part# 37104100Parts designed to be used with LS Engine Swap with RPM Extreme (or similar) LS Swap Kit Minimum 2-1/2" Suspension Lift recommended For 2-Door vehicles, relocation of the fuel tank may be requiredDue to the custom nature of this part, other parts may be required for proper fitment Please contact Kooks Headers and Exhaust before ordering 2007-2018 Jeep Wrangler JK 4-Door w/LS Engine Swap. 3in. Stainless Steel GREEN Catted Y-Pipe. 304 Stainless Steel Construction. 3in. Mandrel Bent 16 ga Tubing. Kooks GREENCats 300 Cell High Flow Catalytic Converters. Torca Swivel Seal style Connection on Inlet. Must be used with Kooks Headers Part# 37102200 or 37102400. Designed to connect to Kooks Cat-Back Exhaust part# 37104100. Parts designed to be used with LS Engine Swap with RPM Extreme (or similar) LS Swap Kit. For 2-Door vehicles; relocation of the fuel tank may be required. Minimum 2-1/2in....

Quantity

Quantity must be 1 or more

Product Info

2007-2018 Jeep Wrangler JK 4-Door w/LS Engine Swap. 3" Stainless Steel GREEN Catted Y-Pipe. 304 Stainless Steel Construction 3" Mandrel Bent 16 ga TubingKooks GREEN Cats 300 Cell High Flow Catalytic Converters Torca Swivel Seal style Connection on InletMust be used with Kooks Headers Part# 37102200 or 37102400 Designed to connect to Kooks Cat-Back Exhaust part# 37104100Parts designed to be used with LS Engine Swap with RPM Extreme (or similar) LS Swap Kit Minimum 2-1/2" Suspension Lift recommended For 2-Door vehicles, relocation of the fuel tank may be requiredDue to the custom nature of this part, other parts may be required for proper fitment Please contact Kooks Headers and Exhaust before ordering

2007-2018 Jeep Wrangler JK 4-Door w/LS Engine Swap. 3in. Stainless Steel GREEN Catted Y-Pipe. 304 Stainless Steel Construction. 3in. Mandrel Bent 16 ga Tubing. Kooks GREENCats 300 Cell High Flow Catalytic Converters. Torca Swivel Seal style Connection on Inlet. Must be used with Kooks Headers Part# 37102200 or 37102400. Designed to connect to Kooks Cat-Back Exhaust part# 37104100. Parts designed to be used with LS Engine Swap with RPM Extreme (or similar) LS Swap Kit. For 2-Door vehicles; relocation of the fuel tank may be required. Minimum 2-1/2in. Suspension Lift recommended. Due to the custom nature of this part; other parts may be required for proper fitment. Please contact Kooks Headers and Exhaust before ordering.

2007-2018 Jeep Wrangler JK 4-Door w/LS Engine Swap. 3" Stainless Steel GREEN Catted Y-Pipe. 304 Stainless Steel Construction. 3" Mandrel Bent 16 ga Tubing. Kooks GREENCats 300 Cell High Flow Catalytic Converters. Torca Swivel Seal style Connection on Inlet. Must be used with Kooks Headers Part# 37102200 or 37102400. Designed to connect to Kooks Cat-Back Exhaust part# 37104100. Parts designed to be used with LS Engine Swap with RPM Extreme (or similar) LS Swap Kit. For 2-Door vehicles, relocation of the fuel tank may be required. Minimum 2-1/2" Suspension Lift recommended. Due to the custom nature of this part, other parts may be required for proper fitment. Please contact Kooks Headers and Exhaust before ordering.

Features & Benefits

Kooks Headers And Exhaust Make The Most Power In The Industry
Kooks System Are Specifically Designed For Maximum Power
Kooks Products Are Made Of T304 Air Craft Quality Steel
Limited Lifetime Warranty To Original Purchaser
3 Generations Being Family Owned And Operated
Every Kooks Product Is Dyno And Race Tested
Kooks Products Fit And Install The Best
100 Percent Manufactured In The USA

Shipping on new purchases

In Stock Items:
In stock items typically ship within 1-3 business days. Most items arrive within 2 business days, but there are situations where it may take up to 5 business days.

Special Order Items:
Special order and out of stock items are product-specific and lead times can vary. Please e-mail us if you are looking for an ETA / Lead Time on a specific product. Special order orders are subject to cancellation if the vendor cannot provide any ETA.

Returns Policy

To start the return process, please e-mail sales@allianceracing.com

Include the following:
Subject "Return for Order#"
Order Number
Part Number
Reason

Returns are eligible for up to 14 days from delivery of items. Accepted refunds can take up to 7-10 business days to process. All refunds are subject to a 25% restocking fee, if opened. Customer may be responsible for return shipping. If 14 days have gone by since your item was delivered, unfortunately we can’t guarantee you a refund or exchange. We reserve the right to deny any return request, based on provided information.

Alliance Racing is not responsible for ensuring part fitment. It is the responsibility of the purchaser to ensure the parts being ordered are the correct fitment for the vehicle intended. Alliance Racing will not accept any returns for incorrect fitment after product is opened.

To be eligible for a return, your item must be unused and in the same condition that you received it. It must also be in the original packaging.

Shipping

To return your product, mail your product to:
Alliance Racing LLC
8810 Twin Lakes Blvd
Tampa, FL 33614

In many cases, you will be responsible for shipping costs to return your item. Shipping costs are non-refundable. If you receive a refund, the cost of shipping will be deducted from your refund.

Depending on your location, the time it may take for your exchanged product to reach you may vary.

If you are shipping an item over $100, you should consider using a trackable shipping service and/or purchasing Shipping Insurance.

Price Matching

To initiate a price match, please e-mail sales@allianceracing.com with the product information (SKU, URL, & Part Name) and a link to the competitors product page for us to validate the price match eligibility.

Please note that there are cases when we cannot offer a price match, but we will do everything in our power to try to match it. Some manufacturers have Pricing Policies that we have to adhere to.

Featured Blogs

Nissan 350Z Gauge Pods: The Best Interior Upgrade for Performance Driving Z33

by Duncan Conner on February 9, 2026

If you own a Nissan 350Z, chances are you’ve already discovered the car’s true personality: it’s a perfect blend of raw performance, driver feel, a... Read more

Porsche’s New Apex Predator: The new 911 Turbo S

by Alex Santamaria on September 7, 2025

Porsche’s latest 911 Turbo S packs 711 hp and a cutting-edge T-Hybrid system, making it the most powerful production 911 to date. But as electric turbos enter the scene, the future of tuning grows more complex. We break down the tech, the track numbers, and what it means for the aftermarket world.

Read the full post to see why this isn’t just evolution—it’s a warning shot for tuners everywhere.

Academy Sim Racing: Bringing Adrenaline-Pumping Action to Your Corporation

by Duncan Conner on May 9, 2024

In the fast-paced world of corporate culture, finding ways to boost morale, foster teamwork, and promote employee well-being is crucia... Read more

Competitive Pricing

Questions?

Free Shipping