VThunder™ has been providing innovative, quality performance products to Harley® enthusiasts for years. From mild or wild cams to state-of-the-art ignitions, VThunder™ has a philosophy that screams out unmatched quality and unbelievable performance. With products from VThunder™, Harley® owners get the same eye-popping, knuckle-whitening performance as with our race-proven parent company, COMP Cams®.