Frequently Asked Questions


Common Acronyms and Abbreviations on the 3SX Site

Where can I find SERVICE MANUALS??

Core Return Form





 Item stock:

Items listed on the website are not guaranteed to be in stock 24/7,
as we have many listings and try to do what we can to stock popular items. 
If you urgently need something, please call ahead to ensure your item is "good in stock",
so we can help you get what you need, when you need it


 3SX will not be held responsible for any shipping carrier delays due to COVID, Remote Locale, Transport Accidents, ETC
(These times are not currently guaranteed by the carriers due to extreme COVID delays)
Shipping times are based on transit time after shipment ( USPS Priority Mail in an Estimate, not Guarantee )
Items on the site are NOT guaranteed to be in stock at all times, but we try hard to keep as much as possible


We try to process orders twice daily, though some will process the next business day(Mon-Fri)
Please allow up to 48 hours processing depending on Holidays/Weather/Backorders/Etc
Out Of Stock and Back-Order items are subject to chance without notice at any time due to availability

 International orders over $100 MUST be paid via confirmed PayPal or Wire Transfer. 

Order will not be shipped by USPS Priority Main International...must be USPS PMI Express or better

3SX is NOT responsible for any customs fees, duties, clearance, etc of any kind




3SX Parts are designed and engineered for high performance applications....and as such carry NO warranty, expressed or implied.

All other respective brands sold by 3SX are subject to their individual warranties, and handled by the MFG



 * All Returns MUST have an RMA Number, please email to get one *


3SX - Returns

4317 Triple Crown Drive SW

Concord, NC 28027


New Parts:

There is a 20% restocking fee for ALL returns. Parts must be NEW, uninstalled, and in their original undamaged packaging. Refunds are processed back to the original method of payment (i.e., we can not issue a refund to a different card or Paypal account than was used to pay for the order originally).


* Special Order Parts are subject to 50% restock fee


Labor costs for any parts purchased and not installed by 3SX, are not eligible for reimbursement under any circumstances.

Any returns after 90 days from invoice date are subject to a 50% restocking fee issued as store credit.

There are no returns after 180 days from invoice date, no exceptions.


Shipping charges are not refundable. Packages which are refused and returned to 3SX will not be refunded the shipping charges and any product credit will be subject to restocking fees and return shipping charges assessed to 3SX by the shipping carrier.


Returned items which were originally shipped from 3SX with free shipping will have standard ground shipping charges also

deducted from any credit due.


Incorrectly ordered parts which are returned to be swapped for a correct/different part will be subject to a reduced 10%

restocking fee and shipping will be charged for the replacement part to be re-shipped out.


New items purchased from 3SX which have been used or installed are not returnable / refundable. 3SX recommends Ebay for selling used parts.


Special order items, body parts (metal and fiberglass), and electronic parts are not returnable/refundable - it is up to the customer/buyer to make sure they are requesting and ordering the correct part prior to it being ordered.


Any International returns must be marked as "returned goods" or any incurred customs fees will be deducted from the credit you receive.


Exception: New parts purchased from 3SX which are found to have a MANUFACTURER'S defect can be exchanged for the same part. The part must be returned to 3SX for inspection and claim with the manufacturer. ALL PARTS AND PACKAGING MUST BE RETURNED. You MUST contact 3SX for a return authorization prior to returning any parts.


Parts which fail due to mis-installation are the responsibility of the buyer/user.


Used Parts:

Used parts purchased from 3SX are sold as is and are not returnable and carry no warranty or guarantee. Condition of used parts will be fully disclosed as accurately as possible prior to sale.



Returned core parts MUST be in usable condition. They can’t be damaged, broken, powdercoated, painted, or otherwise unusable. TURBOS: Can not have catastrophic damage to housing/wheels. PLENUMS & OTHER ENGINE PARTS: All screw threads must be good (not stripped), NA plenums must have the butterfly servo attached and not damaged, parts cannot be cracked/broken in any way, thermostat/water housings must have all three pieces. Upon receipt of Core Parts, 3SX will inspect parts and mail a check to the provided address, or contact you if there are issues with any of the core parts. Core parts must be returned within 60 days of original invoice date for core charge refund. You must include a copy of your invoice and the 3SX Core Return Form with returned parts.


Labor costs for any parts purchased and not installed by 3SX, are not eligible for reimbursement under any circumstances.