We stand behind our products. If you’re not satisfied, you may request an exchange, return, or refund from KTN THERMODYNAMICS for any reason within 90 DAYS from the shipment date of your KIYLEXTM INTAKE PARTS which includes: KIYLEX CARBURETOR SPACERS, KIYLEX INTAKE MANIFOLDS, KIYLEX INTAKE MANIFOLD SPACERS, KIYLEX THROTTLE BODIES, and KIYLEX THROTTLE BODY SPACERS.

Online purchases made by Individual and FLEET Vehicle customers from KTN THERMODYNAMICS of KIYLEX INTAKE PARTS may be returned within 90 days from the shipment date for a refund and within 120 days from the shipment date for webstore credit.

All KIYLEX INTAKE PARTS that are returned and for which a refund or replacement is given will become the property of KTN THERMODYNAMICS upon receipt.

Our return policy applies to KIYLEX INTAKE PARTS you buy directly from KTN THERMODYNAMICS and is non-transferrable, intended only for the original registered vehicle owner. 

KIYLEX INTAKE PARTS purchased from Wholesalers, Retailers, and White Label Partners are subject to the returns policy of the individual vendor. 

We inspect all returned KIYLEX INTAKE PARTS upon arrival. If we receive a part that is not ours, we will either discard it or charge you to ship it back.

*We monitor returns and reserve the right to limit returns or exchanges at any time, for any reason, and refuse service to anyone that may misuse or abuse the policy.

FAQ's

We accept returns of KIYLEX INTAKE PARTS back for webstore credit within 120 days from the shipment date.
After 120 days, we only accept parts back under our KIYLEX LIFETIME REPLACEMENT WARRANTY. Your WARRANTY return requires a replacement order to be placed prior to the return of your original KIYLEX INTAKE PART(S). Upon receipt and inspection of your original KIYLEX INTAKE PART, we will reimburse your replacement order. Any replacement part you receive is also under our KIYLEX LIFETIME REPLACEMENT WARRANTY. See KIYLEX LIFETIME REPLACEMENT WARRANTY.
KIYLEX INTAKE PARTS that are returned in their original packaging along with all supporting documentation and installation components, that have been properly installed and have not been modified or damaged in any way may be refunded up to 90 days or returned up to 120 days for instore credit. All KIYLEX INTAKE PARTS will be inspected prior to a refund or instore credit being issued.
KIYLEX INTAKE PARTS, including individual and Bulk Orders, that are NOT in their original packaging or are missing installation parts or supporting documentation but are still in good condition that have been properly installed and have not been modified or damaged in any way may incur up to a 20% restocking fee. All returns are subject to inspection prior to a refund or in-store credit being issued.

Note: Tax on restocking fees may apply to return items that were shipped and sold by ktnthermo.com for customers in CT, MD, NV, PA, VA, WV, and WI. Some products have additional conditions that may apply.
Yes. Slightly USED KIYLEX INTAKE PARTS that are returned in their original packaging along with all supporting documentation and installation components, that have been properly installed and have not been modified or damaged in any way may be refunded up to 90 days or returned up to 120 days for instore credit in the form of a KTN THERMODYNAMICS e-Gift card for ktnthermo.com. All KIYLEX INTAKE PARTS will be inspected prior to a refund or in-store credit being issued.

However, USED KIYLEX INTAKE PARTS that are NOT in their original packaging or are missing installation parts or supporting documentation, but are still in good condition that has been properly installed and has not been modified or damaged in any way, will incur up to 20% restocking fee, within the first 120 days from your shipment date.

KIYLEX LIFETIME REPLACEMENT WARRANTY returns do not require original packaging to receive a new replacement product and will not be charged a restocking fee.

All returns are subject to inspection prior to a refund or instore credit being issued.
Items that have been delivered in good condition but after delivery were improperly installed, damaged, modified, tampered with, altered, mutilated, destroyed, misused, abused, counterfeit parts, or any products that have a sealing agent such as any type or kind of silicone, glue, or liquid Teflon, cannot be refunded or exchanged.

Items marked as final sale, the partial return of gift sets, and free gifts or promotional items are not eligible for returns.
Free shipping is only for the continental U.S. Outside of that, additional standard shipping fees will apply and are non-refundable. Also, any Expedited shipping costs are non-refundable. Individual cases may vary.

TYPES OF RETURNS

If you notice that your KIYLEX INTAKE PART was delivered to you with damaged, defective, or missing parts, KTN THERMODYNAMICS will help you solve the problem. KIYLEX INTAKE PARTS purchased from KTN THERMODYNAMICS that arrived to you in a damaged or defective condition or missing parts may be returned for an exchange or a full refund within 90 days of purchase. See our How To Return section.
We’re sorry about that. If you received a product different from the one that you ordered, we will be sure to get you the correct KIYLEX INTAKE PART. See our How To Return section.
If you have received KIYLEX INTAKE PARTS as a gift and would like to exchange for other KIYLEX INTAKE PARTS that would be a better fit for your vehicle, you will need to obtain proof of purchase before being able to return or exchange your item(s). if you do not have proof of purchase, see Returning Without a Receipt? How to Obtain Proof of Purchase.  The return of a gift for a refund at the original selling price can only be returned back to the original card of purchase.
Ensure you enclose the correct and complete item when making a return. We need the correct item returned in order to grant a refund.

To protect our associates and customers, KTN THERMODYNAMICS disposes of incorrect/mistaken returns. If you sent an incorrect item to KTN THERMODYNAMICS, contact Customer Service as soon as possible. We can’t guarantee your item will be found and returned, and we don’t provide compensation for any incorrect/mistaken return disposed of.
If you are not satisfied with your Custom product order, we will help you solve the problem. It may be refunded up to 50% of the item price within 90 days of the shipment date or after 90 days, webstore credit within 120 days of the shipment date in the form of a KTN THERMODYNAMICS e-Gift card for ktnthermo.com. Individual cases may vary. Expedited shipping costs are non-refundable.

Custom KIYLEX INTAKE PART orders purchased from KTN THERMODYNAMICS that arrived to you in a damaged or defective condition, different from what was ordered, or have a design error due to a mistake by KTN THERMODYNAMICS, may be returned for an exchange or a full refund within 90 days from the shipment date and an exchange or full web-store credit in the form of a KTN THERMODYNAMICS e-Gift card for ktnthermo.com within 120 days of the shipment date. See our How To Return section.

KTN THERMODYNAMICS has the right of refusal to not engage in custom orders.
As a FLEET Vehicle company, if you are not satisfied with your order, you may receive a 50% refund of your total purchase price of KIYLEX INTAKE PARTS if the order is returned within 90 DAYS from the shipment date and in their original packaging. See our How To Return section.

It's that added protection that you get as reassurance with your purchase.

FLEET Vehicle companies that are returning KIYLEX INTAKE PARTS that are NOT in their original KIYLEX INTAKE PART packaging or are missing installation parts or supporting documentation but are still in good condition that have been properly installed and have not been modified or damaged in any way may incur up to a 20% restocking fee. All returns are subject to inspection prior to a refund or web-store credit being issued.

Note: Tax on restocking fees may apply to return items that were shipped and sold by ktnthermo.com for customers in CT, MD, NV, PA, VA, WV, and WI. Some products have additional conditions that may apply.
Any Returned KIYLEX INTAKE PARTS that have been damaged through customer misuse or otherwise altered after delivery, resized, are missing parts, or are in unsellable condition due to product tampering will not be accepted for exchange or return. Also, the KIYLEX LIFETIME REPLACEMENT WARRANTY will not apply to modified parts. Need a custom part? Give us a call.

All returned KIYLEX INTAKE PARTS will be inspected upon return.
How to Obtain Proof of Purchase:

If you are making a return without proof of purchase and you have the original purchaser’s name or delivery address, simply contact KTN THERMODYNAMICS at 833.4. KIYLEX and press “0” to speak with a representative to obtain the Order number and proof of purchase. Once you know the original order number, continue through the return process as explained in the How To Return section. The return would be processed at the original selling price of the item and funds will be returned back to the original card used for purchase.

All items returned will be inspected for proof of being genuine KIYLEX INTAKE PARTS prior to a refund, exchange, or webstore credit being issued.
The return of NEW or USED KIYLEX INTAKE PARTS without proof of purchase may only be made in exchange for the identical part purchased. The KIYLEX LIFETIME REPLACEMENT WARRANTY is all that applies. No refunds will be issued. See KIYLEX LIFETIME REPLACEMENT WARRANTY.

All items returned will be inspected for proof of being genuine KIYLEX INTAKE PARTS prior to a replacement being issued.

How to Return, Exchange and Replace
Returns, Exchanges, and Replacements are available for KIYLEX INTAKE PARTS. To start the process, simply go to our Returns Page and follow the step-by-step instructions.

Step 1: Enter your order number and the order's ship-to zip or postal code.
Step 2: Click the "Look Up Order" button.
Step 3: Select the quantity of each item to return and the reason for the return.

- For an Exchange, be sure to select the Return Reason as "Exchange".
- For the replacement of a KIYLEX INTAKE PART under our KIYLEX LIFETIME REPLACEMENT WARRANTY, please select the Return Reason as "Warranty".

Step 4: Click the "Submit Request" button.

If the product is not Returnable, you cannot generate a return label for the product and will see a message "This item is unable to be returned."
Packaging Your Return KIYLEX After completing the online return process, you are ready to Package your item(s) by following the steps below:

Step 1: Print out the Return Label

Each return label is assigned to a specific return. Make sure only the items assigned to the Return Label are placed inside the box. If there are items not assigned to the Return Label in the box, it could prevent your return, exchange, or money back from being processed correctly.

The return label provided by KTN THERMODYNAMICS is trackable and will require a signature upon delivery to our Resolution Center.

Step 2: Pack your item(s).

Before shipping a return, photograph the item for your records.

Please securely pack your item(s) to be returned inside a shipping box. Please do not use the KTN THERMODYNAMICS KIYLEX INTAKE PART box as the sole shipping box. Items being returned should be in the original packaging and then placed inside another larger shipping box. In general, the return should be shipped in the same fashion that it arrived to you.

Be sure you enclose the correct and complete item(s) when making a return. We need the correct item(s) returned in order to grant a refund, exchange, or replacement. Additionally, prepackaged KIYLEX COMBO PACKAGES must be returned in their entirety.

Original Packaging or not: KIYLEX INTAKE PARTS that are either exchanges or returns and NOT in their original packaging, are missing installation parts or supporting documentation but are still in good condition that has been properly installed and has not been modified or damaged in any way will incur up to a 20% restocking fee. The 20% restocking fee does not apply to the KIYLEX LIFETIME REPLACEMENT WARRANTY. See our Returning Products without Original Packaging? section.

All returns are subject to inspection prior to a refund or instore credit being issued.

Step 3: Seal the package and tape the return label to the outside of the box.

Step 4: Take your package to the carrier location, as identified on the Return Label, to be delivered.

Also note, KIYLEX LIFETIME REPLACEMENT WARRANTY returns must be returned directly to KTN THERMODYNAMICS and not a 3rd party retail location. Step 5: Add package insurance, which is highly recommended.

KTN THERMODYNAMICS is not liable for any lost or damaged return of KIYLEX INTAKE PARTS being shipped to our Resolution Center. For your benefit, if you are sending the item within the United States and the order is valued at $100 or more, additional package insurance for the value of the merchandise is highly recommended.

If you still have questions, simply contact KTN THERMODYNAMICS at 833.4.KIYLEX and press "0" to speak with a representative to assist you with your return.
Packaging Your Return KTN THERMODYNAMICS is not liable for any lost or damaged return(s) of KIYLEX INTAKE PARTS being shipped to our Resolution Center. For your benefit, if you are sending the item within the United States and the order is valued at $100 or more, additional package insurance for the value of the merchandise is highly recommended.

Return Shipping Costs

If you live in the Continental U.S., your return shipment is free of charge as long as you use the return label provided by KTN THERMODYNAMICS. However, should you choose to ship the item on your own, you'll pay the carrier when you ship your return.

If you live in Alaska or Hawaii, we will refund your return shipping costs up to a maximum amount. However, if you are returning a product that arrived to you as defective, damaged or an incorrect item, you'll be refunded the full postage cost.

We do highly recommend you add package insurance for the value of the returned merchandise at your carrier location as KTN THERMODYNAMICS is not liable for any lost or damaged return of KIYLEX INTAKE PARTS being shipped to our Resolution Center.

See How To Return, Exchange, and Replace
For custom orders, if you live in the Continental U.S., your return shipment is free of charge as long as you use the return label provided by KTN THERMODYNAMICS. However, should you choose to ship the item on your own, you'll pay the carrier when you ship your return.

For custom orders, if you live in Alaska or Hawaii, we will refund your return shipping costs up to a maximum amount. However, if you are returning a product that arrived to you as defective, damaged or an incorrect item, you'll be refunded the full postage cost.

We do highly recommend you add package insurance for the value of the returned merchandise at your carrier location as KTN THERMODYNAMICS is not liable for any lost or damaged return of KIYLEX INTAKE PARTS being shipped to our Resolution Center.

See How To Return, Exchange, and Replace.

Where's My Refund?

It may take 3 to 5 business days to process your return fully and issue your refund. In addition, if we have concerns with authenticity or the condition of the return, we may provide a longer return processing window to evaluate the KIYLEX INTAKE PART(S) which may impact the timing of any applicable refund.

If the condition of the product is misrepresented in the Returns process, such as stating the Return reason for the product as “damaged or defective” and upon testing and inspection, KTN THERMODYNAMICS sees the product is not damaged or defective, a customer fee up to 15% of the product sales price will be imposed. KTN THERMODYNAMICS tests all KIYLEX INTAKE PART(S) upon return.
If you are receiving money back, once your returned item(s) have been received, inspected, processed, and approved by KTN THERMODYNAMICS, you will receive an email notifying you of your refund. Funds will be credited back to you directly via the same payment method used for your original order in the same currency you used for your purchase. The refund will appear in your account in 5 to 10 business days.

Note: Refund timing to a prepaid card depends on the issuer of the card. The refund can take up to 30 days to process based on the policy of the issuer. If you no longer have the physical card, the card is still stored within your account. It can be used toward future purchases on the account it's stored in.
If you are getting store credit for your return, once your returned item(s) have been received, inspected, processed, and approved by KTN THERMODYNAMICS, you will be sent an email with a KIYLEX e-Gift Card to be used at ktnthermo.com

ITEM PARTIAL REFUNDS
Item(s) returned that are missing installation parts or supporting documentation. (Does not include KIYLEX LIFETIME REPLACEMENT WARRANTY returns.) May be subject to a Refund of 80% of the Item Price.
Item(s) returned as defective and the condition of the product is misrepresented by the customer. May be subject to a Refund of 85% of the Item Price.
Item(s) returned that are Custom products and FLEET Vehicle orders. May be subject to a Refund of 50% of the Item Price.
Note: Tax on restocking fees may apply to return items that were shipped and sold by KTN THERMODYNAMICS for customers in CT, MD, NV, PA, VA, WV, and WI. Some products have additional conditions that may apply.

 All KIYLEX INTAKE PARTS purchased directly from ktnthermo.com come with a KIYLEX LIFETIME REPLACEMENT WARRANTY and a 90 DAY MONEY BACK GUARANTEE


Purchase our products with 100% Confidence

KIYLEX IS THE GUARANTEED SOURCE OF INTAKE SYSTEM HEAT REDUCTION IN AUTOMOTIVE

What's on your engine?

What are you waiting for?


TOP
0 Items