Omex Performance USA is a family owned and operated business since 1997. The reason we are in this business is because we love motorcycling. I, Aril Yucelen am a factory certified BMW, Suzuki, Yamaha and Kawasaki technician. I personally inspect each product that we send out and also answer all technical questions. Waranty : All exhaust systems have two year warranty. BMW tuning chips have one month satisfaction quaranty. Cams may not be returned unless we made a mistake. Shipping : Shipping cost is based on weight. If you'd like to order from outside USA please email us with your order and your address, so we can give you a shipping quote. Purchasing : Our site is encrypted, so you can order online without worrying about fraud. If you prefer to purchase without a credit card, you can send us a money order or cashiers check. If you'd like to pay using PayPal please email us with your order and we'll email you an invoice through PayPal including instructions to complete the transaction. We can always be e-mailed or reached by phone at 415 488 1666. Our mailing address is P.O. Box 392 Forest Knolls, CA. 94933.