Please include the following required documentation with your refund claim:
1) Download and completed form. 4720 Guarantee Form
2) Original sales receipt with product price circled.
3) UPC proof of purchase barcode from bottom of box.
4) Copy of failed emission test, work order or diagnostic report from a licensed repair facility or auto parts retail store with reference Code*
Send to: Rislone Cat Complete Guarantee
P.O. Box 187
Holly, MI 48442
All other guarantees, express or implied, are excluded under this guarantee to the extent permitted by law. This guarantee does not apply to vehicles which have been modified or if product is improperly used. Limit one refund per address and household. Refund requests must be submitted within 30 days from date of purchase. Please allow 30 days to receive refund check.