Contact Us

We'd like to hear from you

Who we are

Aftermarket Assassins is a small company dedicated to customer service and providing the most possible power to your vehicle. We have a huge passion for powersports, and believe life is short; so have fun!   We greatly thank you for your business and thank you 100x more for helping us live our dream!   -Mike

Aftermarket Assassins

2348 75th Ave, Osceola, Wisconsin 54020, United States

Call or Text: 715-863-2550


Monday - Friday: 9am - 5pm

Have questions on the weekends or nights? Feel free to send us an or e-mail, text message, (please save calls for during hours) and we'll do our best to answer. Worst case; we won't get back to you until Monday(or the following day if on a weeknight).

Some days and especially early week can be extremely busy for us.  No matter how you get ahold of us, we will get back to you. Your patience is greatly appreciated as we try to help customers in the order they contacted us.

Return Policy

We are easy people to deal with, and we ask the same of you.  If you have any issues, let us know and we'll work to find a solution and compromise.  We do our best to have quality parts but keep in mind all aftermarket parts can take a bit of customization to make work as we push the limits to perform better.  If a part is needed to be returned for any reason, please make sure you okay it with us first, and always have your name and phone number inside the box.  Returns for a refund are only available for new parts, and are subject for a 15% restocking fee to recoup costs(order processing, shipping, receiving, and repackaging).  We cannot accept returns on electrical parts or items have have been used.


Aftermarket Assassins warrants each product it manufactures to be free from defect in material and workmanship for the purpose it was intended. Aftermarket Assassin shall not be liable for damage or delays caused by defective material or workmanship; it is limited to the repair or replacement, as its factory, of any defective article or part thereof, which may be returned to the factory, within 60 days after shipping date to original purchaser. Aftermarket Assassins shall be the sole judge of the existence of any defect in the article so returned. No claim for charges incurred in the removal, disassembly, or reinstallation of such article will be allowed.
This warranty shall not cover any article which has been misused or neglected or damaged by accident; any article which has been altered outside the Aftermarket Assassins factory, or the performance of any engine or equipment on or in which any article of the company’s manufacturer is used.
Aftermarket Assassins shall, in no event, be liable for consequential damage or contingent liability arising out of any total or partial failure to function of any article manufactured by if or of any engine or equipment on or in which it is used. Failure of a user to give notice of claim as to defect claimed under the provisions of this warranty within sixty (60) days of the appearance of such claim shall constitute a waiver by customer of all claims with respect to such goods and equipment.
No expressed, implied, or statutory warranty other than that herein set forth is made or authorized to be made by the company.


USPS (United States Postal Service)

Aftermarket Assassins ships out daily using USPS.  This shipping method is our standard because it's quick and cheap! Normally, domestic orders go out Priority mail which is a 2-3 day service including Saturday(bonus day compared to other carriers). Shipping cutoff time is 1pm CST for USPS shipping.  If your order was placed before this time, your order is still not guaranteed to go out the same day.  If you need something sent out right away, please contact us.


Exhausts and other large shipments will go out Fedex ground(they are too big for USPS) which will pick up the following day from when you order.  Express 1 or 2 day orders will also be sent out Fedex via express.  Cutoff time for Fedex Express is 10am to go out the same day. 

International shipping

International shipments will normally use USPS Priority Mail International (5-10 day service), but we can also ship via DHL express if you call or e-mail.