Know the landed cost before you order
Prices include VAT. Shipping is charged separately and calculated at checkout for your destination. If no shipping option is shown, contact us for a quote before ordering.
Complete the catted exhaust for your LS-swapped Wrangler
Bring the exhaust together on your LS-swapped JK with a Y-pipe made for the matching Kooks conversion headers and cat-back. The 3" stainless assembly includes 300-cell Performance cats for a naturally aspirated LS installation.
SKU: 37103200
Match the complete swap exhaust
37103200 uses TORCA Swivel-Seal front joints and requires Kooks headers 37102200 or 37102400. It is designed to connect to the 37104100 LS-swap cat-back, with the conversion built around RPM Extreme or similar swap hardware.
Plan the engine mounts and clearance
The installation requires a JKLS-HC-ENG-MOUNT engine-mount plate or similar, with GM Gen 4 hydraulic mounts. A minimum 2-1/2" suspension lift is recommended. This page covers the four-door JK; two-door conversions may require fuel-tank relocation and need separate planning.
Matching products
The JK LS-swap headers are one specified header choice for this four-door LS conversion. The swap-kit, hydraulic-mount and recommended lift conditions apply to the complete installation. The JK LS-swap cat-back is the specified rear component for the four-door JK LS conversion, paired with this Y-pipe and the required swap headers.
Vehicle fitment
| Years | Vehicle / trim | Engine | Applicable SKU | Fitting conditions |
|---|---|---|---|---|
| 2018 | Jeep Wrangler JK Unlimited Willys Wheeler | LS engine conversion | 37103200 | Four-door JK LS swap; matching Kooks headers/cat-back; specified mounts; minimum 2-1/2" lift recommended |
| 2018 | Jeep Wrangler JK Unlimited Sport S | LS engine conversion | 37103200 | Four-door JK LS swap; matching Kooks headers/cat-back; specified mounts; minimum 2-1/2" lift recommended |
| 2018 | Jeep Wrangler JK Unlimited Rubicon | LS engine conversion | 37103200 | Four-door JK LS swap; matching Kooks headers/cat-back; specified mounts; minimum 2-1/2" lift recommended |
| 2018 | Jeep Wrangler JK Unlimited Sahara | LS engine conversion | 37103200 | Four-door JK LS swap; matching Kooks headers/cat-back; specified mounts; minimum 2-1/2" lift recommended |
| 2018 | Jeep Wrangler JK Unlimited Sport | LS engine conversion | 37103200 | Four-door JK LS swap; matching Kooks headers/cat-back; specified mounts; minimum 2-1/2" lift recommended |
| 2007-2017 | Jeep Wrangler Unlimited Sahara | LS engine conversion | 37103200 | Four-door JK LS swap; matching Kooks headers/cat-back; specified mounts; minimum 2-1/2" lift recommended |
| 2007-2017 | Jeep Wrangler Unlimited Rubicon | LS engine conversion | 37103200 | Four-door JK LS swap; matching Kooks headers/cat-back; specified mounts; minimum 2-1/2" lift recommended |
| 2007-2010 | Jeep Wrangler Unlimited X | LS engine conversion | 37103200 | Four-door JK LS swap; matching Kooks headers/cat-back; specified mounts; minimum 2-1/2" lift recommended |
| 2010-2017 | Jeep Wrangler Unlimited Sport | LS engine conversion | 37103200 | Four-door JK LS swap; matching Kooks headers/cat-back; specified mounts; minimum 2-1/2" lift recommended |
| 2010 | Jeep Wrangler Unlimited Mountain | LS engine conversion | 37103200 | Four-door JK LS swap; matching Kooks headers/cat-back; specified mounts; minimum 2-1/2" lift recommended |
| 2016 | Jeep Wrangler Unlimited 75th Anniversary | LS engine conversion | 37103200 | Four-door JK LS swap; matching Kooks headers/cat-back; specified mounts; minimum 2-1/2" lift recommended |
| 2016 | Jeep Wrangler Unlimited Sport S | LS engine conversion | 37103200 | Four-door JK LS swap; matching Kooks headers/cat-back; specified mounts; minimum 2-1/2" lift recommended |
| 2017 | Jeep Wrangler Unlimited Winter Edition | LS engine conversion | 37103200 | Four-door JK LS swap; matching Kooks headers/cat-back; specified mounts; minimum 2-1/2" lift recommended |
| 2017 | Jeep Wrangler Unlimited Smoky Mountain | LS engine conversion | 37103200 | Four-door JK LS swap; matching Kooks headers/cat-back; specified mounts; minimum 2-1/2" lift recommended |
Intended use
37103200: Competition, off-road and track use only. Not for use on public roads.
Ordering and delivery
Estimated lead time is 4-6 weeks. Delivery may be faster depending on stock levels. Shipping is charged separately.
Technical specifications
| Specification | Details |
|---|---|
| SKU | 37103200 |
| Application | 2007-2018 Jeep JK four-door with LS engine swap |
| Material | 16-gauge 304 stainless steel |
| Pipework / front joint | 3" / TORCA Swivel-Seal |
| Cats | 300-cell Performance; naturally aspirated only |
| Required exhaust | 37102200 or 37102400 headers; 37104100 cat-back |
| Mounting | RPM Extreme or similar swap kit; JKLS-HC-ENG-MOUNT or similar plate; GM Gen 4 hydraulic mounts |
| Lift recommendation | Minimum 2-1/2" suspension lift recommended |
Frequently asked questions
Will it fit my standard Wrangler engine?
This Y-pipe is for an LS engine conversion with the specified matching Kooks exhaust components.
Can I use these cats on a supercharged LS?
The Performance cats are for naturally aspirated use. Choose the appropriate catalyst arrangement for a boosted conversion.
