Cheap And Discounts Jet ski Fuel Injectors for Sea-Doo Challenger GTI GTR GTX RS RXP RXT Speedster Wake 1503 4-Tec 155-510 HP 420874846 006-622 Wholesale. Buy Directly From Merchant FSR Motorcycle Parts Store. Enjoy ✓Free Shipping Worldwide! ✓90 Days Buyer Protection. ✓Easy Return. ✓Money Back Guarantee.