Horsepower Additives T-shirt

Increase your top end horsepower and bottom end torque with this high efficiency garment printed on a 100% cotton heavy blank. Screen printed inner label.

Free Shipping

Free standard shipping on orders over $60 USD


We offer free shipping in North America (USA + Canada) for orders over $60 USD before tax and/or discount. USA bound orders are shipped via UPS Parcel or USPS First Class. Canadian orders are sent via priority mail.

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