Kooks Headers
Kooks Universal 2.5 Inch GREEN Catalyst 7.5 Inch Length
* Images may be a representation and may not reflect the actual product.
Product Details
2-1/2in. Kooks GREENCATS High Flow Catalytic Converter Certified to EPA Standards. 2-1/2in. I.D. Inlet and Outlet. 4in. Long 4in. O.D Body. 7in. Overall Length. 400 CPSI High Flow Substrate. Helps remove harmful emissions from exhaust. Catalytic Converter Certified to EPA Standards. Elimination of check engine light not guaranteed. Ok for use with Forced Induction. RATED FOR 375 HORSEPOWER PER CAT-750 HORSEPOWER PER PAIR
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!
2-1/2in. Kooks GREENCATS High Flow Catalytic Converter Certified to EPA Standards. 2-1/2in. I.D. Inlet and Outlet. 4in. Long 4in. O.D Body. 7in. Overall Length. 400 CPSI High Flow Substrate. Helps remove harmful emissions from exhaust. Catalytic Converter Certified to EPA Standards. Elimination of check engine light not guaranteed. Rated for up to 425 Horsepower per Cat. Ok for use with Forced Induction.
2-1/2 Kooks GREENCATS High Flow Catalytic Converter Certified to EPA Standards. 2-1/2 I.D. Inlet and Outlet. 4 Long 4 O.D Body. 7 Overall Length. 400 CPSI High Flow Substrate. Helps remove harmful emissions from exhaust. Catalytic Converter Certified to EPA Standards. Elimination of check engine light not guaranteed. Rated for up to 425 Horsepower per Cat. Ok for use with Forced Induction.
2-1/2in. Kooks GREEN High Flow Catalytic Converter Certified to EPA Standards. 2-1/2in. I.D. Inlet and Outlet 4in. Long 4in. O.D Body 7in. Overall Length 400 CPSI High Flow Substrate Helps reduce harmful emissions in exhaust Catalytic Converter Certified to EPA Standards Elimination of check engine light not guaranteed Rated for up to 425 Horsepower per CatOk for use with Forced Induction
2-1/2in. High Flow Catalytic Converter Certified to EPA Standards. 2-1/2in. I.D. Inlet and Outlet. 4in. Long 4in. O.D Body. 7in. Overall Length. 400 CPSI High Flow Substrate. Helps remove harmful emissions from exhaust. Catalytic Converter Certified to EPA Standards. Elimination of check engine light not guaranteed. Rated for up to 425 Horsepower per Cat. Ok for use with Forced Induction.
2-1/2 Kooks GREEN High Flow Catalytic Converter Certified to EPA Standards. 2-1/2 I.D. Inlet and Outlet 4 Long 4 O.D Body 7 Overall Length 400 CPSI High Flow Substrate Helps reduce harmful emissions in exhaust Catalytic Converter Certified to EPA Standards Elimination of check engine light not guaranteed Rated for up to 425 Horsepower per CatOk for use with Forced Induction
2-1/2 High Flow Catalytic Converter Certified to EPA Standards. 2-1/2 I.D. Inlet and Outlet. 4 Long 4 O.D Body. 7 Overall Length. 400 CPSI High Flow Substrate. Helps remove harmful emissions from exhaust. Catalytic Converter Certified to EPA Standards. Elimination of check engine light not guaranteed. Rated for up to 425 Horsepower per Cat. Ok for use with Forced Induction.
2-1/2in. Catalytic Converter Certified to EPA Standards. 2-1/2in. I.D. Inlet and Outlet. 4in. Long 4in. O.D Body. 7in. Overall Length. 400 CPSI High Flow Substrate. Rated for up to 425 HP/Cat. Ok for use with Forced Induction.
2-1/2 Catalytic Converter Certified to EPA Standards. 2-1/2 I.D. Inlet and Outlet. 4 Long 4 O.D Body. 7 Overall Length. 400 CPSI High Flow Substrate. Rated for up to 425 HP/Cat. Ok for use with Forced Induction.
2-1/2in. Kooks GREENCATS Catalytic Converter 7in. Long Certified to EPA Standard
2-1/2 Kooks GREENCATS Catalytic Converter 7 Long Certified to EPA Standards
Vehicle Fitment
Universal or product-specific fitment. Please review the product details and contact us if you need help confirming fitment before ordering.
Product Specs
- Brand
- Kooks Headers
- Part Number
- ge-90148
- Catalog Number
- 001602040
- Product Line
- Green Cat
- Category
- Exhaust
- Type
- Catalytic Converter Universal
- UPC / Barcode
- 842422180119
- Vendor Product Category
- Exhaust, Mufflers & Tips
- Vendor Product Subcategory
- Catalytic Converter Universal
- Length
- 8.00 in
- Width
- 4.00 in
- Height
- 4.00 in
- Weight
- 3.30 lb
- Units Per SKU
- 1
- Freight / LTL
- No
- Air Restricted
- No
- Prop 65
- Y
- EPA Status
- Compliant
- CARB Approved
- No
- Clearance Item
- No
Shipping & Availability
This item is showing available inventory. Most in-stock performance parts ship quickly, but timing can vary by warehouse, vendor cut-off time, holidays, and carrier pickup.
STATE RESTRICTIONS: This item is not CARB approved and can not ship to California.
PROP 65 WARNING: This product can expose you to chemicals, which are known to the State of California to cause cancer or birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.
Inventory shown: 18 available as of 6/3/2026.
LIFETIME WARRANTY
Kooks Headers and Exhaust products are covered under our limited lifetime warranty. This warranty is limited to the repair or replacement of the product if the problem is due to faulty materials or workmanship. The warranty does not cover any coatings, polishing, painting, etc. and will NOT cover any re-coatings, re-polishing, or re-paintings to the headers.
Kooks will not warranty any exhaust product that has been improperly installed, crashed, welded, or modified (coatings, header wraps, etc) in any way. Kooks will not cover damage to any related components. Neither the seller, nor Kooks, will be responsible or liable for any loss, damage or injury resulting from the direct or indirect use of this product or inability by the purchaser to determine proper use or application of this product. Kooks Headers and Exhaust products are built for off-highway use only and disclaim all liability for products used in racing activities and/or applications other than those specifically recommended in the current catalog.
Claimed defective products must be returned with a Returned Merchandise Authorization (RMA) number to Kooks at the buyer’s expense. Products returned without an RMA number are subject to refusal. The returned product will need to include your name, address, daytime phone number, RMA number, and a copy of your sales receipt if available. Warranty will not be considered without a copy of your sales receipt. Upon receipt, Kooks Headers and Exhaust will, at its option, repair or replace the defective item.
KOOKS MUFFLERS
Kooks Headers and Exhaust Mufflers come with a 2 year limited replacement warranty. The muffler in question will need to have an Returned Merchandise Authorization (RMA) number and follow the same warranty return policy as stated above. Once the product is received by Kooks, it will be evaluated to determine the reason for failure. If cause of failure is determined to be impact damage, the claim will be denied. If it is a defective part that caused the failure, then the said muffler will be replaced and shipped back to the consumer at no charge. If it is determined to be an issue other than part failure, then we can offer a replacement muffler at a discounted rate.
CATALYTIC CONVERTERS
Vehicles equipped with a factory supercharger or turbocharger will only receive a warranty on Kooks Catalysts if they have the GREENCATS. There will be no warranty on our standard high flow catalyst if the vehicle comes equipped with a factory forced induction system. Furthermore, we recommend upgrading to the GREENCATS if your application will be producing more than 600 horsepower. GREENCATS can be installed on any of the Kooks exhaust systems.
Example: A Ford Mustang GT500, which comes equipped with a supercharger from Ford, will only receive a Kooks-backed warranty if they are running the GREENCATS.
Kooks Headers and Exhaust EPA-Certified GREENCATS come with a 2-year limited replacement warranty. The standard High Flow Race Catalyst come with a 1-year limited replacement warranty. The catalyst in question will need to have a Returned Merchandise Authorization (RMA) number and follow the same warranty return policy as stated above. Once the product is received by Kooks, it will be evaluated to determine the reason for failure. If it is a defective part that caused the failure, then the said catalyst will be replaced and shipped back to the consumer at no charge. If it is determined to be an issue other than part failure, then we can offer a cat replacement program at a discounted rate.
Reviews & Questions
Real product feedback when available, plus quick ways to get fitment or product help.
Other Popular Catalytic Converter Universal
Kooks Headers. Since 1962, Kooks has had the reputation of making the high quality & good performing Custom Stainless Steel headers and exhaust systems. All Kooks Exhausts and Headers are handcrafted here in the USA! Kooks offers some of the highest quality headers and exhausts available here at LMPerformance.com (along with Billy Boat, American Racing Headers, and Stainless Works Headers).
Kooks Headers and Exhaust offers production applications for many late model domestic automobiles. This means that you can get that custom header for your early or late model application for a fraction of the cost. There is no other header company in the country that can offer you a header for your gas engine truck, while still building handmade custom race headers that are used in applications making over 3,000 horsepower. KOOK's pride itself on being the pioneers in the stainless steel header revolution and have become the innovators in the exhaust industry as a whole. Kooks designs, tests, and manufacturers their products here in the USA. Don't forget to checkout American Racing Headers!
Review our return, cancellation, shipping, warranty, and product image policies before ordering.
Contact us with questions before ordering
California Residents: Prop 65 WARNING: This product MAY contain chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. Wash hands after handling. For more information, visit www.P65Warnings.ca.gov
California Residents: TIRE WARNING: LMPerformance will not ship Tires to California.
Legal: Some or all of these parts may not comply with Federal, State, Province, and/or Local laws, ordinances, and regulations. Buyer takes all responsibility to ensure that any modifications or upgrades that have done conform to all applicable laws and regulations for road use, especially pertaining to safety and emissions. LMPerformance is not responsible for buyer not complying with Federal, State, Province, and/or Local laws, ordinances, and regulations. This policy shall be in force for all past, current, and future purchases from LMPerformance, Inc. LMPerformance will not ship ANY non-CARB compliant products to California where California requires products to be CARB certified such as Catalytic Converters and Induction Kits.
Free Shipping: Please note FREE Shipping refers to shipping within the contiguous continental US only. All other locations extra. Some items that require Truck Freight Delivery will require a Truck Freight surcharge. This surcharge is still a discounted shipping amount that is lower then the actual truck freight shipping charge that is charged to LMP. LMP will try to still give the lowest price possible for truck freight items.
Images: Images may be a representation and may not reflect the actual product. Examples would be SPEC stage 3 clutch kits which all use the same photo.
TYPOS: LMPerformance tries to present the best most accurate information on our website. Sometimes we get mistakes in product information sent from vendors such as typos. We can not be responsible for these typos, if you see something that does not look right please let us know before ordering so we can double check for you first. LMPerformance will not pay for typos in any way, monetarily or otherwise.
Price Errors: In the event that a product has mistakenly been listed at an incorrect price, We reserve the right to refuse or cancel any orders placed for product listed at the incorrect price. We reserve the right to refuse or cancel any such orders whether or not the order has been confirmed and your account charged. If your payment type has already been charged for the purchase and your order is cancelled, a full refund to your orignial payment method in the amount of the incorrect price will be issued.
Special Order ITEMS: Some items are Special Ordered and may not be returnable, or even cancellable as they are going into production specifically because you ordered them. Special Ordered items can have a 5-35% cancelation fee.
Cancellations: Instock orders cannot be canceled due to our automated ordering & fast shipping system. To keep our prices low, all cancelations are subject to a 5% cancelation fee to cover transaction processing fees. We reserve the right to charge up to a 10% cancellation fee for cancelled orders due to merchant fees, Special Order fees and the cost of processing and shipping orders.When you request a cancellation of an order or a part, please note that it may take time for a manufacturer to cancel an order if the order is drop-shipped. We also have to confirm that the product has not shipped. If the product has shipped then this must be processed as a return.Also note that sometimes products ship more quickly than expected, so we recommend that you do not purchase alternative products until receiving final confirmation of the cancellation.
Returns: We cannot accept returns on parts that have been used or installed. No returns will be accepted after 30 days. All Returns must be in original packaging. Prior authorization must be given before any return can be made. Up to a 25% Restocking Fee may apply. Special Orders may be subject to Additional Manufacturer Restock Fees as well. Shipping cost will not be refunded.Hoods as well as PCM Programmers may not be returned unless defective and only for replacement. ALL returns must be first filed using our online form found here: https://www.lmperformance.com/returns.
Lost Order Claims All lost order/package claims must be made within 5 days of the shipping date or tracking information delivery date. All claimes made after this date will not be accepted due to Shipping companies policies of filing loss claims.
Damaged Items or Incorrect Items: Please contact us right away if your item has been damaged in shipping or are incorrect. Please note that we will ship replacement items the same method of shipping the order was originally placed for. LMPerformance can not ship packages overnight at our cost if the original shipping was not also overnight. Claims must be filed in order for replacement parts to be shipped.
Warranties:Any warranty claims must be placed with the manufacturer. All of the products sold by LMPerformance, regardless of the manufacturer, are designed for Racing and Performance applications. Many of our manufacturers offer NO WARRANTY on their products, either stated or implied, due to the unusual stresses placed on the parts and because we have no control over how they are installed and used. Many of these products are designed for off-road use only and are not legal for use on public highways. If you have a question about the warranty on a specific product, please e-mail or call us. Buyer assumes all risk and liability associated with these products.
Installation: We are not responsible for or any costs associated with the installation or the improper installation of any products. Purchaser assumes the risk associated with the installation of products. We, along with the manufacturer of each product are not responsible for any direct or indirect damage to the vehicle, personal, or costs incurred from the use of products.