First order? Use FIRSTORDER for 5% off.
×

Questions? E-mail us:

sales@allianceracing.com

0 My Cart: $0.00

Your cart is currently empty.

Continue shopping
Toggle menu
Alliance Racing
0
-9%
Kooks 15-26 Mustang GT/DH 5.0L 4V 1-7/8 x3 SS Headers w/Ultra Green Catted Conn Pipe/w OEM Adapters - 1151H452
Kooks 15-26 Mustang GT/DH 5.0L 4V 1-7/8 x3 SS Headers w/Ultra Green Catted Conn Pipe/w OEM Adapters - 1151H452
Kooks 15-26 Mustang GT/DH 5.0L 4V 1-7/8 x3 SS Headers w/Ultra Green Catted Conn Pipe/w OEM Adapters - 1151H452
Click to zoom in
Load image into Gallery viewer, Kooks 15-26 Mustang GT/DH 5.0L 4V 1-7/8 x3 SS Headers w/Ultra Green Catted Conn Pipe/w OEM Adapters - 1151H452
Load image into Gallery viewer, Kooks 15-26 Mustang GT/DH 5.0L 4V 1-7/8 x3 SS Headers w/Ultra Green Catted Conn Pipe/w OEM Adapters - 1151H452
Load image into Gallery viewer, Kooks 15-26 Mustang GT/DH 5.0L 4V 1-7/8 x3 SS Headers w/Ultra Green Catted Conn Pipe/w OEM Adapters - 1151H452
Buyer Confidence

Shop With Confidence

Clear availability, helpful support, and customer-first policies before you check out.

  • Competitive Pricing

    We will beat most prices!

  • Questions?

    Contact us at sales@allianceracing.com

  • Free Shipping

    Free shipping on orders over $300!

Kooks 15-26 Mustang GT/DH 5.0L 4V 1-7/8 x3 SS Headers w/Ultra Green Catted Conn Pipe/w OEM Adapters - 1151H452

Exhaust, Mufflers & Tips Headers & Manifolds
Kooks Headers
ksh1151H452
Backordered
September 5, 2026
Not CARB compliant. Not legal for sale or use in California on emissions-controlled vehicles.
$4,471.49 $4,968.32
Kooks Headers and Exhaust has been the leader in the High Performance Exhaust Industry for over 50 Years! Since 1962, Kooks takes pride in offering the best Headers and complete exhaust systems for your street, race and off-road applications. We have won hundreds of championships and set countless records in the NHRA, IHRA, NMCA, NMRA, NASCAR, NASA, SCCA and many other racing organizations. Now with three generations of family leadership, we are proud to say that all of our products are handcrafted here in the USA and we are proud to still be independently owned and operated. And don't forget, "Get Kookin with KOOKS!" 2015-2026 Mustang GT/Dark Horse 5.0L 4V 1-7/8" x 3" Stainless Headers w/ ULTRA GREEN Catted Connection Pipes and OEM Adapters. 304 Stainless Steel Construction. 3/8" Thick Laser Cut Flanges. 1-7/8" Mandrel Bent Primaries. 3" Collectors with Kooks' Patented Scavenging Spike. Dual Bolt Pattern Header Flange. Kooks ULTRA GREEN Cats EPA verified 400 Cell High Flow Catalytic Converters. Kooks ULTRAGREEN Cats are engineered to perform in Modern Muscle cars making up to 850 RWHP. Includes Gaskets, Oxygen Sensor Extension Harness, Clamps, Bolt Kit and O2 Spacers for Installation. No additional parts required.
Kooks 15+ Mustang 5.0L 4V 2in x 3in SS Headers w/Green Catted OEM Connection Pipe - 1151H631
Kooks 15+ Mustang 5.0L 4V 2in x 3in SS Headers w/Green Catted OEM Connection Pipe - 1151H631
$3,507.13 $3,156.42
Kooks 15+ Mustang 5.0L 4V 1 7/8in x 3in SS Headers w/ Green Catted OEM Conn. Right Hand Drive - 1155H430
Kooks 15+ Mustang 5.0L 4V 1 7/8in x 3in SS Headers w/ Green Catted OEM Conn. Right Hand Drive - 1155H430
$3,468.32 $3,121.49
Kooks 15-26 Mustang GT/DH 5.0L 4V 1-7/8 x3 SS Headers w/Ultra Green Catted Conn Pipe/w OEM Adapters - 1151H452
SKU: ksh1151H452
Product Details

Everything You Need To Know

Review product information, shipping and returns, and price-match details before you order.

Product Info

Kooks Headers and Exhaust has been the leader in the High Performance Exhaust Industry for over 50 Years! Since 1962, Kooks takes pride in offering the best Headers and complete exhaust systems for your street, race and off-road applications. We have won hundreds of championships and set countless records in the NHRA, IHRA, NMCA, NMRA, NASCAR, NASA, SCCA and many other racing organizations. Now with three generations of family leadership, we are proud to say that all of our products are handcrafted here in the USA and we are proud to still be independently owned and operated. And don't forget, "Get Kookin with KOOKS!"

2015-2026 Mustang GT/Dark Horse 5.0L 4V 1-7/8" x 3" Stainless Headers w/ ULTRA GREEN Catted Connection Pipes and OEM Adapters. 304 Stainless Steel Construction. 3/8" Thick Laser Cut Flanges. 1-7/8" Mandrel Bent Primaries. 3" Collectors with Kooks' Patented Scavenging Spike. Dual Bolt Pattern Header Flange. Kooks ULTRA GREEN Cats EPA verified 400 Cell High Flow Catalytic Converters. Kooks ULTRAGREEN Cats are engineered to perform in Modern Muscle cars making up to 850 RWHP. Includes Gaskets, Oxygen Sensor Extension Harness, Clamps, Bolt Kit and O2 Spacers for Installation. No additional parts required.

Read More
Read Less

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.

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.

Your cart

×